How do I tell a JIC 37° fitting apart from a SAE 45° fitting by eye?

Six dash sizes share identical thread designations and pitches (−02 through −05, −08, and −10). The only field discriminator is the seat angle: 37° on JIC connectors and 45° on SAE J512 connectors. Use a thread protractor or seat-angle gauge — visual estimation from the flare alone is not reliable.

Are JIC 37° and SAE 45° fittings interchangeable where they share the same thread?

No. A matching thread designation does not confirm interchangeability. The sealing geometry differs (37° vs 45° flare), and mixing the two can result in a leaking or structurally inadequate joint. Confirm the seat angle at the fitting before assembly.

What is the difference between NPTF and NPSM threads?

NPTF (dryseal tapered pipe thread) is tapered — the thread diameter increases along the length, and the pressure-tight seal is made by thread engagement. NPSM (straight mechanical joint pipe thread) is parallel — the same thread diameter along the length, and the seal is made at a 30° mechanical seat or chamfer outside the thread. Both use 60° inch pipe thread form and share nominal thread designations (e.g., 1/2-14), so taper confirmation is required.

What is the difference between SAE ORB and ORFS connectors?

SAE O-Ring Boss (ORB) seals with an O-ring beneath the male shoulder compressed into a port chamfer or spotface. O-Ring Face Seal (ORFS) seals with an O-ring in a groove machined into the flat male face, which seats against a flat female face. The thread designations overlap at many nominal sizes but use different pitch series — for example, the ORB −06 uses 9/16-18 and the ORFS −06 uses 11/16-16.

Can a BSPT male fitting thread into a BSPP female port?

The thread form (55° Whitworth) is the same, but BSPT is tapered and BSPP is parallel. A tapered male will enter a parallel female port, but the joint is not designed to seal this way. ISO 228-1 explicitly states that pressure-tightness in BSPP is not made on the thread itself — it requires a separate seal method at the face or with a bonded washer. Mixing taper and parallel pipe threads risks a leak or structural failure.

How do DIN 24° Light and Heavy series differ?

Both use 24° cone sealing geometry and share many of the same metric thread designations. The distinction is the tube outer diameter for which each series is intended — the Heavy series is designed for higher-pressure applications with heavier tube walls at the same thread size. This dataset records manufacturer-confirmed thread and major-diameter fields; it does not resolve Light vs Heavy from thread designation alone. Tube OD and application pressure must be confirmed at the assembly.

What is the difference between ISO 6149 and ISO 9974 metric ports?

Both use ISO metric parallel thread. ISO 6149 seals with an O-ring compressed into a port chamfer (truncated housing) beneath the male shoulder — the O-ring is visible at the shoulder. ISO 9974 seals at the port face using a sealing washer, elastomeric seal, or metal-to-metal face contact — not an O-ring under the shoulder. ISO 6149 is the recommended family for new hydraulic threaded-port designs per SAE J1926/2 and ISO/TC 131/SC 4. A metal-to-metal port face or a washer seat indicates ISO 9974.

Research dataset — published July 29, 2026

Hydraulic Fitting Identification Tool

Cross-reference 17 hydraulic connector families by thread designation, major diameter, pitch, and sealing geometry. 155 size records sourced from Danfoss, Parker, and official SAE and ISO standards pages, verified July 2026.

Connector families

155

Size records

122

★ Directly verified

● Manufacturer-sourced

Scope and Limitations

This dataset covers the thread designation, major thread OD, pitch, taper, seat geometry, seal location, and known-lookalike fields for 17 common hydraulic connector families used in mobile equipment, industrial machines, and process hydraulics. It is an identification aid — not proof of interchangeability, pressure-rating selection, or assembly specification.

This dataset does not cover: pressure ratings, torque values, material compatibility, hose selection, crimp specifications, assembly procedures, or manufacturing tolerances. It does not cover ISO 8434-6 60° cone size rows, quick-coupler profiles, or exact SAE J518 flange sizing beyond family-routing rules.

A dataset match — where all published discriminating fields agree with one record — is described as confirmed in the original dataset methodology. A confirmed match means the identification is internally consistent with the published dimensional record. It does not mean the assembly is safe to use, compatible with the mating component, or within its pressure rating. The fitting and equipment manufacturer specification is always the governing reference.

Note on new-design guidance: SAE J1926/2 and ISO/TC 131/SC 4 direct new hydraulic threaded-port designs to ISO 6149 (metric O-ring port) rather than SAE ORB or ISO 9974. ISO 8434-3 states metric tubing is preferred for new ORFS designs. ISO 8434-1 states elastomeric-seal connectors are preferred where permitted. These new-design preferences are documented in the standards register but are not identification guidance for existing assemblies.

How to Use This Data

1. Measure the thread designation. Use a thread pitch gauge for TPI (threads per inch) and a micrometer or caliper for the major thread OD. Record both.
2. Identify the thread system. Is it UN/UNF inch, 60° inch pipe (NPT), 55° BSP pipe, or ISO metric? The thread form angle distinguishes inch-UNF (60°) from BSP (55°) and from metric (60°). A 55° form indicates BSPP or BSPT; a tapered profile with that form indicates BSPT.
3. Confirm the sealing geometry. Thread designation alone is not sufficient for families that share designations — especially JIC 37°, SAE 45°, SAE ORB, and SAE flareless 24°, which share all 13 UNF thread designations. Examine the seat angle, the presence of an O-ring, and whether a ferrule or cutting ring is present.
4. Match to this table. Find the row where thread designation, major OD, pitch, and seat geometry all agree. A match on thread alone is not confirmation.
5. Note the confidence ceiling. Each family section lists what constitutes a confirmed vs probable match. If a field is missing or ambiguous, the tool cannot resolve the family — confirm at the machine or with the equipment manufacturer.

Family Overview Table

All 17 families in this dataset. Click a family name to jump to the full size table and disambiguation guidance.

Hydraulic fitting family overview — 17 families, 155 size records, 2 family-routing rules
Family	Standard	Thread type	Seal summary	Records	Tier
JIC 37°	SAE J514-1; ISO 8434-2	UN/UNF parallel	37° flare, metal-to-metal	13	★
SAE 45°	SAE J512	UN/UNF parallel	45° flare, metal-to-metal	10	★
SAE ORB	SAE J1926; ISO 11926	UN/UNF parallel	O-ring under shoulder	13	★
ORFS	SAE J1453; ISO 8434-3	UN/UNF parallel	O-ring in flat male face	10	★/●
NPTF	SAE J514/3; ASME B1.20.3	60° inch tapered	Thread engagement (dryseal)	9	★
NPSM	SAE J514/3; ASME B1.20.1	60° inch parallel	30° mechanical seat	9	★
BSPP (G)	ISO 228-1	55° BSP parallel	External seal (varies)	10	★
BSPT (R/Rc)	ISO 7-1	55° BSP tapered	Thread engagement (tapered)	10	★
JIS BSPP 30°	JIS B 8363; JIS B 0202	55° BSP parallel	30° flare on BSP parallel	6	●
Komatsu / Link-Belt 30°	Manufacturer family	ISO metric parallel	30° flare on metric thread	7	●
DIN 24° Light	ISO 8434-1	ISO metric parallel	24° cone; cutting ring	10	●
DIN 24° Heavy	ISO 8434-1	ISO metric parallel	24° cone; cutting ring	10	●
SAE Code 61 Flange	SAE J518	4-bolt flange	O-ring face (flange head)	routing rule	★
SAE Code 62 Flange	SAE J518	4-bolt flange	O-ring face (flange head)	routing rule	★
SAE Flareless 24°	SAE J514/2; ISO 8434-1	UN/UNF parallel	24° cone with ferrule	13	★
ISO 9974 Metric Port	ISO 9974-1	ISO metric parallel	Port-face washer / seal	11	★
ISO 6149 Metric O-Ring Port	ISO 6149-1:2022	ISO metric parallel	O-ring under shoulder	14	★

Source: Hydraulic Connector Identification Dataset v1.1.0 — Memphis Hydraulic Hose Repair Research, verified July 29, 2026. Download the full dataset.

JIC 37° (SAE J514-1 / ISO 8434-2)

Standard: SAE J514-1_202606; ISO 8434-2:2007
Thread system: UN/UNF straight thread (parallel)
Seal method: Metal-to-metal line contact at 37° sealing surfaces
Common lookalikes: SAE J512 45° flare; SAE J1926 O-ring boss; SAE J514/2 flareless 24° cone

Field disambiguation: Measure the sealing geometry: 37° confirms JIC; 45° indicates SAE J512; an O-ring under the shoulder indicates ORB; a 24° cone with a ferrule indicates flareless.

JIC 37° (SAE J514-1 / ISO 8434-2) — size records (13 rows)
Nominal	Dash	Thread designation	Taper	Major OD (in)	Major OD (mm)	Pitch (TPI)	Pitch (mm)	Seat	Seal	Tier
1/8	-02	5/16-24	parallel	0.3100	7.87	24	1.0583	37°	Male flare / female cone seat	★
3/16	-03	3/8-24	parallel	0.3800	9.65	24	1.0583	37°	Male flare / female cone seat	★
1/4	-04	7/16-20	parallel	0.4400	11.18	20	1.2700	37°	Male flare / female cone seat	★
5/16	-05	1/2-20	parallel	0.5000	12.70	20	1.2700	37°	Male flare / female cone seat	★
3/8	-06	9/16-18	parallel	0.5600	14.22	18	1.4111	37°	Male flare / female cone seat	★
1/2	-08	3/4-16	parallel	0.7500	19.05	16	1.5875	37°	Male flare / female cone seat	★
5/8	-10	7/8-14	parallel	0.8800	22.35	14	1.8143	37°	Male flare / female cone seat	★
3/4	-12	1-1/16-12	parallel	1.0600	26.92	12	2.1167	37°	Male flare / female cone seat	★
7/8	-14	1-3/16-12	parallel	1.1900	30.23	12	2.1167	37°	Male flare / female cone seat	★
1	-16	1-5/16-12	parallel	1.3100	33.27	12	2.1167	37°	Male flare / female cone seat	★
1-1/4	-20	1-5/8-12	parallel	1.6300	41.40	12	2.1167	37°	Male flare / female cone seat	★
1-1/2	-24	1-7/8-12	parallel	1.8800	47.75	12	2.1167	37°	Male flare / female cone seat	★
2	-32	2-1/2-12	parallel	2.5000	63.50	12	2.1167	37°	Male flare / female cone seat	★

Source: Danfoss Brass Products Global Catalog (pp. 13–14), SAE J514-1, ISO 8434-2. Verification tiers explained below.

Confidence ceiling: Confirmed only when thread, pitch, 37° seat, and seal location agree.

SAE 45° (SAE J512)

Standard: SAE J512_202511
Thread system: UN/UNF straight thread (parallel)
Seal method: Metal-to-metal line contact at 45° sealing surfaces
Common lookalikes: JIC 37° flare (six shared dash sizes)

Field disambiguation: Confirm a 45° male flare and female cone; do not identify by thread alone. Seat angle is the only field discriminator from JIC in the six shared sizes.

SAE 45° (SAE J512) — size records (10 rows)
Nominal	Dash	Thread designation	Taper	Major OD (in)	Major OD (mm)	Pitch (TPI)	Pitch (mm)	Seat	Seal	Tier
1/8	-02	5/16-24	parallel	0.3100	7.87	24	1.0583	45°	Male flare / female cone seat	★
3/16	-03	3/8-24	parallel	0.3800	9.65	24	1.0583	45°	Male flare / female cone seat	★
1/4	-04	7/16-20	parallel	0.4400	11.18	20	1.2700	45°	Male flare / female cone seat	★
5/16	-05	1/2-20	parallel	0.5000	12.70	20	1.2700	45°	Male flare / female cone seat	★
3/8	-06	5/8-18	parallel	0.6300	16.00	18	1.4111	45°	Male flare / female cone seat	★
1/2	-08	3/4-16	parallel	0.7500	19.05	16	1.5875	45°	Male flare / female cone seat	★
5/8	-10	7/8-14	parallel	0.8800	22.35	14	1.8143	45°	Male flare / female cone seat	★
3/4	-12	1-1/16-14	parallel	1.0600	26.92	14	1.8143	45°	Male flare / female cone seat	★
7/8	-14	1-1/4-12	parallel	1.2500	31.75	12	2.1167	45°	Male flare / female cone seat	★
1	-16	1-3/8-12	parallel	1.3800	35.05	12	2.1167	45°	Male flare / female cone seat	★

Source: Danfoss Brass Products Global Catalog; SAE J512_202511. Verification tiers explained below.

Confidence ceiling: Confirmed only when thread, pitch, and 45° seat agree.

SAE O-Ring Boss (SAE J1926 / ISO 11926)

Standard: SAE J1926/1_202301; J1926/2_202303; J1926/3_202305
Thread system: UN/UNF straight thread (parallel)
Seal method: O-ring beneath male shoulder compressed into port chamfer/spotface
Common lookalikes: JIC 37° flare; SAE flareless 24° cone

Field disambiguation: Confirm the O-ring beneath the male shoulder and the mating port chamfer. A 37° nose indicates JIC; a 24° cone with ferrule indicates flareless.

SAE O-Ring Boss (SAE J1926 / ISO 11926) — size records (13 rows)
Nominal	Dash	Thread designation	Taper	Major OD (in)	Major OD (mm)	Pitch (TPI)	Pitch (mm)	Seal	Tier
1/8	-02	5/16-24	parallel	0.3125	7.94	24	1.0583	O-ring under shoulder / port chamfer	★
3/16	-03	3/8-24	parallel	0.3750	9.52	24	1.0583	O-ring under shoulder / port chamfer	★
1/4	-04	7/16-20	parallel	0.4375	11.11	20	1.2700	O-ring under shoulder / port chamfer	★
5/16	-05	1/2-20	parallel	0.5000	12.70	20	1.2700	O-ring under shoulder / port chamfer	★
3/8	-06	9/16-18	parallel	0.5625	14.29	18	1.4111	O-ring under shoulder / port chamfer	★
1/2	-08	3/4-16	parallel	0.7500	19.05	16	1.5875	O-ring under shoulder / port chamfer	★
5/8	-10	7/8-14	parallel	0.8750	22.22	14	1.8143	O-ring under shoulder / port chamfer	★
3/4	-12	1-1/16-12	parallel	1.0625	26.99	12	2.1167	O-ring under shoulder / port chamfer	★
7/8	-14	1-3/16-12	parallel	1.1875	30.16	12	2.1167	O-ring under shoulder / port chamfer	★
1	-16	1-5/16-12	parallel	1.3125	33.34	12	2.1167	O-ring under shoulder / port chamfer	★
1-1/4	-20	1-5/8-12	parallel	1.6250	41.27	12	2.1167	O-ring under shoulder / port chamfer	★
1-1/2	-24	1-7/8-12	parallel	1.8750	47.62	12	2.1167	O-ring under shoulder / port chamfer	★
2	-32	2-1/2-12	parallel	2.5000	63.50	12	2.1167	O-ring under shoulder / port chamfer	★

Source: Parker Port End Assembly Guide; SAE J1926/1, /2, /3; note: SAE J1926/2 directs new designs to ISO 6149. Verification tiers explained below.

Confidence ceiling: Confirmed when thread, pitch, and O-ring under shoulder agree.

O-Ring Face Seal (SAE J1453 / ISO 8434-3)

Standard: SAE J1453/1_201906; J1453/2_201504; J1453/3_201206; ISO 8434-3:2005
Thread system: UN/UNF straight thread (parallel) — distinct pitch from ORB/JIC at same nominal
Seal method: O-ring in flat male face against flat female face
Common lookalikes: SAE ORB at same nominal size; SAE flareless 24°

Field disambiguation: ORFS has a flat male face with an O-ring groove; ORB has an O-ring under the shoulder and a chamfered port. Thread designation alone is not decisive at overlapping nominally-sized joints.

O-Ring Face Seal (SAE J1453 / ISO 8434-3) — size records (10 rows)
Nominal	Dash	Thread designation	Taper	Major OD (in)	Major OD (mm)	Pitch (TPI)	Pitch (mm)	Seat	Seal	Tier
1/4	-04	9/16-18	parallel	0.5625	14.29	18	1.4111	Flat	O-ring groove in flat male face	★
3/8	-06	11/16-16	parallel	0.6875	17.46	16	1.5875	Flat	O-ring groove in flat male face	★
1/2	-08	13/16-16	parallel	0.8125	20.64	16	1.5875	Flat	O-ring groove in flat male face	★
5/8	-10	1-14	parallel	1.0000	25.40	14	1.8143	Flat	O-ring groove in flat male face	★
3/4	-12	1-3/16-12	parallel	1.1875	30.16	12	2.1167	Flat	O-ring groove in flat male face	★
7/8	-14	1-5/16-12	parallel	1.3125	33.34	12	2.1167	Flat	O-ring groove in flat male face	●
1	-16	1-7/16-12	parallel	1.4375	36.51	12	2.1167	Flat	O-ring groove in flat male face	★
1-1/4	-20	1-11/16-12	parallel	1.6875	42.86	12	2.1167	Flat	O-ring groove in flat male face	★
1-1/2	-24	2-12	parallel	2.0000	50.80	12	2.1167	Flat	O-ring groove in flat male face	★
2	-32	2-1/2-12	parallel	2.5000	63.50	12	2.1167	Flat	O-ring groove in flat male face	●

Source: Parker Catalog 4300 (v12, 11/2025); SAE J1453/1–3; sizes 7/8 and 2 are Parker catalog extensions outside SAE J1453. Verification tiers explained below.

Confidence ceiling: Confirmed when thread, flat face geometry, and O-ring groove agree.

NPTF — Dryseal Tapered Pipe Thread (SAE J514/3)

Standard: SAE J514/3_202312; ASME B1.20.3
Thread system: 60° inch tapered pipe thread
Seal method: Dryseal — pressure-tight joint made on tapered thread engagement
Common lookalikes: NPSM (same nominal, parallel thread); BSPT (similar appearance but 55° form)

Field disambiguation: Confirm taper with a straight-edge or thread gauge. NPTF is tapered; NPSM is parallel with the same TPI. BSPT is also tapered but uses 55° thread form.

NPTF — Dryseal Tapered Pipe Thread (SAE J514/3) — size records (9 rows)
Nominal	Dash	Thread designation	Taper	Major OD (in)	Major OD (mm)	Pitch (TPI)	Pitch (mm)	Seal	Tier
1/8	-02	1/8-27	tapered	0.4100	10.41	27	0.9407	Thread engagement (dryseal)	★
1/4	-04	1/4-18	tapered	0.5400	13.72	18	1.4111	Thread engagement (dryseal)	★
3/8	-06	3/8-18	tapered	0.6800	17.27	18	1.4111	Thread engagement (dryseal)	★
1/2	-08	1/2-14	tapered	0.8400	21.34	14	1.8143	Thread engagement (dryseal)	★
3/4	-12	3/4-14	tapered	1.0500	26.67	14	1.8143	Thread engagement (dryseal)	★
1	-16	1-11.5	tapered	1.3200	33.53	11.5	2.2087	Thread engagement (dryseal)	★
1-1/4	-20	1-1/4-11.5	tapered	1.6600	42.16	11.5	2.2087	Thread engagement (dryseal)	★
1-1/2	-24	1-1/2-11.5	tapered	1.9000	48.26	11.5	2.2087	Thread engagement (dryseal)	★
2	-32	2-11.5	tapered	2.3800	60.45	11.5	2.2087	Thread engagement (dryseal)	★

Source: Danfoss Brass Products Global Catalog; SAE J514/3_202312; ASME B1.20.3. Verification tiers explained below.

Confidence ceiling: Confirmed when thread designation, taper, and 60° form agree.

NPSM — Straight Mechanical Joint Pipe Thread (SAE J514/3)

Standard: SAE J514/3_202312; ASME B1.20.1
Thread system: 60° inch pipe thread (parallel)
Seal method: 30° mechanical seat or chamfer outside the thread
Common lookalikes: NPTF male of the same nominal size; BSPP; other straight pipe-thread swivels

Field disambiguation: Confirm parallel thread and the 30° mechanical sealing surfaces. Thread size alone cannot distinguish NPSM from NPTF female — a Danfoss note states a chamfered NPTF male can seal with an NPSM female.

NPSM — Straight Mechanical Joint Pipe Thread (SAE J514/3) — size records (9 rows)
Nominal	Dash	Thread designation	Taper	Major OD (in)	Major OD (mm)	Pitch (TPI)	Pitch (mm)	Seat	Seal	Tier
1/8	-02	1/8-27	parallel	0.4100	10.41	27	0.9407	30°	30° seat / chamfer	★
1/4	-04	1/4-18	parallel	0.5400	13.72	18	1.4111	30°	30° seat / chamfer	★
3/8	-06	3/8-18	parallel	0.6800	17.27	18	1.4111	30°	30° seat / chamfer	★
1/2	-08	1/2-14	parallel	0.8400	21.34	14	1.8143	30°	30° seat / chamfer	★
3/4	-12	3/4-14	parallel	1.0500	26.67	14	1.8143	30°	30° seat / chamfer	★
1	-16	1-11.5	parallel	1.3200	33.53	11.5	2.2087	30°	30° seat / chamfer	★
1-1/4	-20	1-1/4-11.5	parallel	1.6600	42.16	11.5	2.2087	30°	30° seat / chamfer	★
1-1/2	-24	1-1/2-11.5	parallel	1.9000	48.26	11.5	2.2087	30°	30° seat / chamfer	★
2	-32	2-11.5	parallel	2.3800	60.45	11.5	2.2087	30°	30° seat / chamfer	★

Source: Danfoss Brass Products Global Catalog; SAE J514/3_202312. Verification tiers explained below.

Confidence ceiling: Confirmed when thread designation, parallel taper, and 30° seat agree.

BSPP — Parallel British Standard Pipe (ISO 228-1)

Standard: ISO 228-1:2000, confirmed 2022
Thread system: 55° British Standard Whitworth parallel pipe thread
Seal method: Seal is outside the parallel thread; connector may use cone, flat-face, O-ring, or bonded seal
Common lookalikes: BSPT (same nominal sizes, tapered vs parallel); JIS BSPP 30° (parallel thread, 30° seat)

Field disambiguation: Confirm a 55° thread form and parallel thread profile. Seal method (cone, flat-face, O-ring, bonded) varies by connector design. ISO 228-1 states pressure-tightness is not made on the thread itself.

BSPP — Parallel British Standard Pipe (ISO 228-1) — size records (10 rows)
Nominal	Dash	Thread designation	Taper	Major OD (in)	Major OD (mm)	Pitch (TPI)	Pitch (mm)	Seat	Seal	Tier
1/8	-02	G 1/8-28	parallel	0.3800	9.65	28	0.9071	Varies	Outside threads; cone, flat, O-ring, or bonded	★
1/4	-04	G 1/4-19	parallel	0.5200	13.21	19	1.3368	Varies	Outside threads; cone, flat, O-ring, or bonded	★
3/8	-06	G 3/8-19	parallel	0.6500	16.51	19	1.3368	Varies	Outside threads; cone, flat, O-ring, or bonded	★
1/2	-08	G 1/2-14	parallel	0.8200	20.83	14	1.8143	Varies	Outside threads; cone, flat, O-ring, or bonded	★
5/8	-10	G 5/8-14	parallel	0.8800	22.35	14	1.8143	Varies	Outside threads; cone, flat, O-ring, or bonded	★
3/4	-12	G 3/4-14	parallel	1.0400	26.42	14	1.8143	Varies	Outside threads; cone, flat, O-ring, or bonded	★
1	-16	G 1-11	parallel	1.3000	33.02	11	2.3091	Varies	Outside threads; cone, flat, O-ring, or bonded	★
1-1/4	-20	G 1-1/4-11	parallel	1.6500	41.91	11	2.3091	Varies	Outside threads; cone, flat, O-ring, or bonded	★
1-1/2	-24	G 1-1/2-11	parallel	1.8800	47.75	11	2.3091	Varies	Outside threads; cone, flat, O-ring, or bonded	★
2	-32	G 2-11	parallel	2.3500	59.69	11	2.3091	Varies	Outside threads; cone, flat, O-ring, or bonded	★

Source: Danfoss Brass Products Global Catalog; ISO 228-1:2000. Verification tiers explained below.

Confidence ceiling: Confirmed when 55° thread form, parallel profile, and pitch agree; seal method confirmed at connector face.

BSPT — Tapered British Standard Pipe (ISO 7-1)

Standard: ISO 7-1:1994, confirmed 2026; Cor 1:2007
Thread system: 55° British Standard Whitworth tapered pipe thread
Seal method: Pressure-tight joint made on tapered thread engagement
Common lookalikes: BSPP (same nominal, parallel vs tapered); NPTF (also tapered but 60° form)

Field disambiguation: Confirm a 55° thread form and tapered thread profile. BSPP uses the same thread designations with parallel thread; NPTF is also tapered but uses 60° form.

BSPT — Tapered British Standard Pipe (ISO 7-1) — size records (10 rows)
Nominal	Dash	Thread designation	Taper	Major OD (in)	Major OD (mm)	Pitch (TPI)	Pitch (mm)	Seal	Tier
1/8	-02	R 1/8-28	tapered	0.3800	9.65	28	0.9071	Thread engagement (tapered)	★
1/4	-04	R 1/4-19	tapered	0.5200	13.21	19	1.3368	Thread engagement (tapered)	★
3/8	-06	R 3/8-19	tapered	0.6500	16.51	19	1.3368	Thread engagement (tapered)	★
1/2	-08	R 1/2-14	tapered	0.8200	20.83	14	1.8143	Thread engagement (tapered)	★
5/8	-10	R 5/8-14	tapered	0.8800	22.35	14	1.8143	Thread engagement (tapered)	★
3/4	-12	R 3/4-14	tapered	1.0400	26.42	14	1.8143	Thread engagement (tapered)	★
1	-16	R 1-11	tapered	1.3000	33.02	11	2.3091	Thread engagement (tapered)	★
1-1/4	-20	R 1-1/4-11	tapered	1.6500	41.91	11	2.3091	Thread engagement (tapered)	★
1-1/2	-24	R 1-1/2-11	tapered	1.8800	47.75	11	2.3091	Thread engagement (tapered)	★
2	-32	R 2-11	tapered	2.3500	59.69	11	2.3091	Thread engagement (tapered)	★

Source: Danfoss Brass Products Global Catalog; ISO 7-1:1994. Verification tiers explained below.

Confidence ceiling: Confirmed when 55° thread form, tapered profile, and pitch agree.

JIS BSPP 30° (JIS B 8363 / JIS B 0202)

Standard: JIS B 8363:2015; JIS B 0202:1999
Thread system: Parallel pipe thread (ISO 228-1 / JIS B 0202 form); 55° thread form
Seal method: 30° metal-to-metal flare against mating seat
Common lookalikes: BSPP (same thread; no 30° seat); Komatsu 30° metric (metric thread, same seat angle)

Field disambiguation: Confirm a 30° sealing seat on a parallel BSP thread. A BSPP connector uses the same thread but seals at the face, cone, or bonded washer — not a 30° seat.

JIS BSPP 30° (JIS B 8363 / JIS B 0202) — size records (6 rows)
Nominal	Dash	Thread designation	Taper	Major OD (in)	Major OD (mm)	Pitch (TPI)	Pitch (mm)	Seat	Seal	Tier
1/4	-04	G 1/4-19	parallel	0.5200	13.21	19	1.3368	30°	30° flare / seat	●
3/8	-06	G 3/8-19	parallel	0.6500	16.51	19	1.3368	30°	30° flare / seat	●
1/2	-08	G 1/2-14	parallel	0.8200	20.83	14	1.8143	30°	30° flare / seat	●
3/4	-12	G 3/4-14	parallel	1.0400	26.42	14	1.8143	30°	30° flare / seat	●
1	-16	G 1-11	parallel	1.3000	33.02	11	2.3091	30°	30° flare / seat	●
1-1/4	-20	G 1-1/4-11	parallel	1.6500	41.91	11	2.3091	30°	30° flare / seat	●

Source: Danfoss Z Series Braided Hose Ends Quick Reference; JIS B 8363:2015; JIS B 0202:1999. Verification tiers explained below.

Confidence ceiling: Probable — these six rows are official Danfoss manufacturer offerings; full paid JIS dimensional tables were not reproduced.

Komatsu / Link-Belt 30° Metric (Manufacturer Family)

Standard: Manufacturer connection family — current Danfoss Z-series offering, verified July 2026
Thread system: ISO metric straight thread (parallel)
Seal method: 30° metal-to-metal flare against mating seat
Common lookalikes: DIN 24° metric (same metric thread sizes, different seat angle); JIS 30° (same seat, BSP thread)

Field disambiguation: Confirm a 30° seating angle on a metric thread. A DIN 24° connector uses the same metric thread designations but a 24° cone with a cutting ring.

Komatsu / Link-Belt 30° Metric (Manufacturer Family) — size records (7 rows)
Dash	Thread designation	Taper	Major OD (in)	Major OD (mm)	Pitch (TPI)	Pitch (mm)	Seat	Seal	Tier
-04	M14×1.5	parallel	0.5512	14.00	—	1.5000	30°	30° flare / seat	●
-06	M18×1.5	parallel	0.7087	18.00	—	1.5000	30°	30° flare / seat	●
-08	M22×1.5	parallel	0.8661	22.00	—	1.5000	30°	30° flare / seat	●
-10	M24×1.5	parallel	0.9449	24.00	—	1.5000	30°	30° flare / seat	●
-12	M30×1.5	parallel	1.1811	30.00	—	1.5000	30°	30° flare / seat	●
-16	M33×1.5	parallel	1.2992	33.00	—	1.5000	30°	30° flare / seat	●
-20	M36×1.5	parallel	1.4173	36.00	—	1.5000	30°	30° flare / seat	●

Source: Danfoss Z Series Braided Hose Ends Quick Reference; no consensus-standard claim made. Verification tiers explained below.

Confidence ceiling: Probable — seven manufacturer thread offerings; no consensus-standard membership asserted.

DIN 24° Light Series (ISO 8434-1 / SAE J514/2)

Standard: ISO 8434-1:2018, confirmed 2024
Thread system: ISO metric straight thread (parallel)
Seal method: 24° cone with cutting ring or O-ring seal depending on connector design
Common lookalikes: DIN 24° Heavy (same thread, different tube OD for some sizes); Komatsu 30° metric (same metric thread, different seat angle)

Field disambiguation: Confirm a 24° cone and the presence of a cutting ring or ferrule. Distinguish Light vs Heavy by tube OD for the same thread designation — this dataset does not resolve Light vs Heavy from thread alone.

DIN 24° Light Series (ISO 8434-1 / SAE J514/2) — size records (10 rows)
Thread designation	Taper	Major OD (in)	Major OD (mm)	Pitch (TPI)	Pitch (mm)	Seat	Seal	Tier
M12×1.5	parallel	0.4724	12.00	—	1.5000	24°	24° cone; cutting ring or O-ring	●
M14×1.5	parallel	0.5512	14.00	—	1.5000	24°	24° cone; cutting ring or O-ring	●
M16×1.5	parallel	0.6299	16.00	—	1.5000	24°	24° cone; cutting ring or O-ring	●
M18×1.5	parallel	0.7087	18.00	—	1.5000	24°	24° cone; cutting ring or O-ring	●
M22×1.5	parallel	0.8661	22.00	—	1.5000	24°	24° cone; cutting ring or O-ring	●
M26×1.5	parallel	1.0236	26.00	—	1.5000	24°	24° cone; cutting ring or O-ring	●
M30×2	parallel	1.1811	30.00	—	2.0000	24°	24° cone; cutting ring or O-ring	●
M36×2	parallel	1.4173	36.00	—	2.0000	24°	24° cone; cutting ring or O-ring	●
M45×2	parallel	1.7717	45.00	—	2.0000	24°	24° cone; cutting ring or O-ring	●
M52×2	parallel	2.0472	52.00	—	2.0000	24°	24° cone; cutting ring or O-ring	●

Source: Danfoss Z Series Braided Hose Ends Quick Reference; ISO 8434-1:2018. Verification tiers explained below.

Confidence ceiling: Probable — manufacturer-offering union used; not labeled as exhaustive ISO 8434-1 reproduction.

DIN 24° Heavy Series (ISO 8434-1 / SAE J514/2)

Standard: ISO 8434-1:2018, confirmed 2024
Thread system: ISO metric straight thread (parallel)
Seal method: 24° cone with cutting ring or O-ring seal depending on connector design
Common lookalikes: DIN 24° Light (same thread designation range, different tube OD); Komatsu 30° metric

Field disambiguation: Same cone angle and thread forms as the Light series. Distinguish by tube OD for the same thread size. This dataset does not resolve Light vs Heavy from thread alone — check tube wall thickness and application.

DIN 24° Heavy Series (ISO 8434-1 / SAE J514/2) — size records (10 rows)
Thread designation	Taper	Major OD (in)	Major OD (mm)	Pitch (TPI)	Pitch (mm)	Seat	Seal	Tier
M14×1.5	parallel	0.5512	14.00	—	1.5000	24°	24° cone; cutting ring or O-ring	●
M16×1.5	parallel	0.6299	16.00	—	1.5000	24°	24° cone; cutting ring or O-ring	●
M18×1.5	parallel	0.7087	18.00	—	1.5000	24°	24° cone; cutting ring or O-ring	●
M20×1.5	parallel	0.7874	20.00	—	1.5000	24°	24° cone; cutting ring or O-ring	●
M22×1.5	parallel	0.8661	22.00	—	1.5000	24°	24° cone; cutting ring or O-ring	●
M24×1.5	parallel	0.9449	24.00	—	1.5000	24°	24° cone; cutting ring or O-ring	●
M30×2	parallel	1.1811	30.00	—	2.0000	24°	24° cone; cutting ring or O-ring	●
M36×2	parallel	1.4173	36.00	—	2.0000	24°	24° cone; cutting ring or O-ring	●
M42×2	parallel	1.6535	42.00	—	2.0000	24°	24° cone; cutting ring or O-ring	●
M52×2	parallel	2.0472	52.00	—	2.0000	24°	24° cone; cutting ring or O-ring	●

Source: Danfoss Z Series Braided Hose Ends Quick Reference; ISO 8434-1:2018. Verification tiers explained below.

Confidence ceiling: Probable — manufacturer-offering union used; not labeled as exhaustive ISO 8434-1 reproduction.

SAE Flareless 24° (SAE J514/2 / ISO 8434-1)

Standard: SAE J514/2_202404; ISO 8434-1:2018
Thread system: UN/UNF straight thread (parallel) — same thread series as JIC 37° and SAE ORB
Seal method: 24° cone with ferrule / cutting ring bite
Common lookalikes: JIC 37° flare; SAE ORB (identical threads in all 13 dash sizes; sealing geometry is the only field discriminator)

Field disambiguation: The 13 thread designations are identical to JIC 37° and SAE ORB. Confirm a 24° cone and the presence of a ferrule or cutting ring. A 37° cone indicates JIC; an O-ring under the shoulder indicates ORB.

SAE Flareless 24° (SAE J514/2 / ISO 8434-1) — size records (13 rows)
Nominal	Dash	Thread designation	Taper	Major OD (in)	Major OD (mm)	Pitch (TPI)	Pitch (mm)	Seat	Seal	Tier
1/8	-02	5/16-24	parallel	0.3100	7.87	24	1.0583	24°	24° cone and ferrule/cutting ring	★
3/16	-03	3/8-24	parallel	0.3800	9.65	24	1.0583	24°	24° cone and ferrule/cutting ring	★
1/4	-04	7/16-20	parallel	0.4400	11.18	20	1.2700	24°	24° cone and ferrule/cutting ring	★
5/16	-05	1/2-20	parallel	0.5000	12.70	20	1.2700	24°	24° cone and ferrule/cutting ring	★
3/8	-06	9/16-18	parallel	0.5600	14.22	18	1.4111	24°	24° cone and ferrule/cutting ring	★
1/2	-08	3/4-16	parallel	0.7500	19.05	16	1.5875	24°	24° cone and ferrule/cutting ring	★
5/8	-10	7/8-14	parallel	0.8800	22.35	14	1.8143	24°	24° cone and ferrule/cutting ring	★
3/4	-12	1-1/16-12	parallel	1.0600	26.92	12	2.1167	24°	24° cone and ferrule/cutting ring	★
7/8	-14	1-3/16-12	parallel	1.1900	30.23	12	2.1167	24°	24° cone and ferrule/cutting ring	★
1	-16	1-5/16-12	parallel	1.3100	33.27	12	2.1167	24°	24° cone and ferrule/cutting ring	★
1-1/4	-20	1-5/8-12	parallel	1.6300	41.40	12	2.1167	24°	24° cone and ferrule/cutting ring	★
1-1/2	-24	1-7/8-12	parallel	1.8800	47.75	12	2.1167	24°	24° cone and ferrule/cutting ring	★
2	-32	2-1/2-12	parallel	2.5000	63.50	12	2.1167	24°	24° cone and ferrule/cutting ring	★

Source: Parker Catalog 4300 (v12, 11/2025); SAE J514/2_202404; ISO 8434-1:2018. Verification tiers explained below.

Confidence ceiling: Confirmed when thread, pitch, 24° cone, and ferrule/cutting ring agree.

ISO 9974 Metric Port (DIN 3852 family)

Standard: ISO 9974-1:1996, confirmed 2021; under review 2026
Thread system: ISO metric straight thread (parallel)
Seal method: Elastomeric or metal-to-metal seal outside the thread at port face
Common lookalikes: ISO 6149 metric O-ring port (same metric thread sizes; different seal geometry at port)

Field disambiguation: Confirm a washer, elastomeric seal, or metal-to-metal port face. A port chamfer / truncated housing with an O-ring under the shoulder indicates ISO 6149. Note: SAE J1926/2 and ISO/TC 131/SC 4 direct new designs to ISO 6149, not ISO 9974.

ISO 9974 Metric Port (DIN 3852 family) — size records (11 rows)
Nominal	Thread designation	Taper	Major OD (in)	Major OD (mm)	Pitch (TPI)	Pitch (mm)	Seal	Tier
M10	M10×1	parallel	0.3937	10.00	25.4000	1.0000	Washer or metal-to-metal port face	★
M12	M12×1.5	parallel	0.4724	12.00	16.9333	1.5000	Washer or metal-to-metal port face	★
M14	M14×1.5	parallel	0.5512	14.00	16.9333	1.5000	Washer or metal-to-metal port face	★
M16	M16×1.5	parallel	0.6299	16.00	16.9333	1.5000	Washer or metal-to-metal port face	★
M18	M18×1.5	parallel	0.7087	18.00	16.9333	1.5000	Washer or metal-to-metal port face	★
M20	M20×1.5	parallel	0.7874	20.00	16.9333	1.5000	Washer or metal-to-metal port face	★
M22	M22×1.5	parallel	0.8661	22.00	16.9333	1.5000	Washer or metal-to-metal port face	★
M27	M27×2	parallel	1.0630	27.00	12.7000	2.0000	Washer or metal-to-metal port face	★
M33	M33×2	parallel	1.2992	33.00	12.7000	2.0000	Washer or metal-to-metal port face	★
M42	M42×2	parallel	1.6535	42.00	12.7000	2.0000	Washer or metal-to-metal port face	★
M48	M48×2	parallel	1.8898	48.00	12.7000	2.0000	Washer or metal-to-metal port face	★

Source: Parker Port End Assembly Guide; ISO 9974-1:1996. Verification tiers explained below.

Confidence ceiling: Confirmed when metric thread, pitch, and port-face seal geometry agree.

ISO 6149 Metric O-Ring Port (Recommended for New Designs)

Standard: ISO 6149-1:2022 (edition 4); ISO 6149-2 and -3 for stud ends
Thread system: ISO metric straight thread (parallel)
Seal method: O-ring compressed into port chamfer / truncated housing beneath the male shoulder
Common lookalikes: ISO 9974 metric port (same metric thread; different port seal geometry)

Field disambiguation: Confirm an O-ring beneath the male shoulder and a mating port chamfer/truncated housing. A washer or metal-to-metal port face indicates ISO 9974. ISO 6149 is the recommended family for new hydraulic threaded-port designs per SAE J1926/2 and ISO/TC 131/SC 4.

ISO 6149 Metric O-Ring Port (Recommended for New Designs) — size records (14 rows)
Nominal	Thread designation	Taper	Major OD (in)	Major OD (mm)	Pitch (TPI)	Pitch (mm)	Seal	Tier
M8	M8×1	parallel	0.3150	8.00	25.4000	1.0000	O-ring under shoulder into port chamfer	★
M10	M10×1	parallel	0.3937	10.00	25.4000	1.0000	O-ring under shoulder into port chamfer	★
M12	M12×1.5	parallel	0.4724	12.00	16.9333	1.5000	O-ring under shoulder into port chamfer	★
M14	M14×1.5	parallel	0.5512	14.00	16.9333	1.5000	O-ring under shoulder into port chamfer	★
M16	M16×1.5	parallel	0.6299	16.00	16.9333	1.5000	O-ring under shoulder into port chamfer	★
M18	M18×1.5	parallel	0.7087	18.00	16.9333	1.5000	O-ring under shoulder into port chamfer	★
M20	M20×1.5	parallel	0.7874	20.00	16.9333	1.5000	O-ring under shoulder into port chamfer	★
M22	M22×1.5	parallel	0.8661	22.00	16.9333	1.5000	O-ring under shoulder into port chamfer	★
M27	M27×2	parallel	1.0630	27.00	12.7000	2.0000	O-ring under shoulder into port chamfer	★
M30	M30×2	parallel	1.1811	30.00	12.7000	2.0000	O-ring under shoulder into port chamfer	★
M33	M33×2	parallel	1.2992	33.00	12.7000	2.0000	O-ring under shoulder into port chamfer	★
M42	M42×2	parallel	1.6535	42.00	12.7000	2.0000	O-ring under shoulder into port chamfer	★
M48	M48×2	parallel	1.8898	48.00	12.7000	2.0000	O-ring under shoulder into port chamfer	★
M60	M60×2	parallel	2.3622	60.00	12.7000	2.0000	O-ring under shoulder into port chamfer	★

Source: Parker Port End Assembly Guide; ISO 6149-1:2022. Verification tiers explained below.

Confidence ceiling: Confirmed when metric thread, pitch, O-ring under shoulder, and port chamfer agree.

SAE Code 61 and Code 62 Flanges (SAE J518)

SAE Code 61 and Code 62 4-bolt flange connections are governed by SAE J518. This dataset includes family-routing rules for both flange codes but does not publish exact flange head or bolt-hole dimensions, which require a verified SAE J518 dimensional table. Both codes use an O-ring face seal between the flange head and a flat port face.

Field disambiguation: Measure the flange head outer diameter and bolt-hole circle against a verified SAE J518 dimensional table to confirm Code 61 vs Code 62. At the same nominal bore size, Code 62 has a larger flange head than Code 61. Dataset v1.1.0 returns exact flange size as unresolved — dimensional confirmation at the assembly is required.

Source: SAE J518 (official standard record). Dataset v1.1.0 — routing rules only; not an exact size reproduction.

Thread-Overlap Disambiguation

These thread designations appear in two or more families in this dataset. Thread designation alone is never sufficient to confirm a family where overlap exists.

Thread designations shared by multiple hydraulic fitting families — disambiguation required in all cases
Thread designation	Overlapping families	Required field discriminator
5/16-24	JIC 37° / SAE 45° / SAE ORB / SAE flareless 24°	Seat angle (37° vs 45°) and presence of O-ring or ferrule
3/8-24	JIC 37° / SAE 45° / SAE ORB / SAE flareless 24°	Seat angle and seal geometry
7/16-20	JIC 37° / SAE 45° / SAE ORB / SAE flareless 24°	Seat angle and seal geometry
1/2-20	JIC 37° / SAE 45° / SAE ORB / SAE flareless 24°	Seat angle and seal geometry
3/4-16	JIC 37° / SAE 45° / SAE ORB / SAE flareless 24°	Seat angle and seal geometry
7/8-14	JIC 37° / SAE 45° / SAE ORB / SAE flareless 24°	Seat angle and seal geometry
M14×1.5	DIN 24° Light / DIN 24° Heavy / Komatsu 30° metric / ISO 6149	Seat angle (24° vs 30°) and port vs connector geometry
M18×1.5	DIN 24° Light / DIN 24° Heavy / Komatsu 30° metric / ISO 6149	Seat angle and port vs connector geometry
M22×1.5	DIN 24° Light / DIN 24° Heavy / Komatsu 30° metric / ISO 6149	Seat angle and port vs connector geometry
M12×1.5	DIN 24° Light / ISO 9974 / ISO 6149	Port seal geometry: port chamfer + O-ring (6149), face seal (9974), or cone + ring (DIN)
M16×1.5	DIN 24° Light / DIN 24° Heavy / ISO 9974 / ISO 6149	Seat angle and port vs connector geometry
G 1/4-19	BSPP / JIS BSPP 30°	Presence of 30° seating seat (JIS) vs external-seal face connector (BSPP)
G 1/2-14	BSPP / JIS BSPP 30°	Presence of 30° seating seat
1/4-18	NPTF / NPSM	Taper: gauge thread with straight-edge or go/no-go gauge
1/2-14	NPTF / NPSM	Taper: NPTF is tapered, NPSM is parallel

Source: Hydraulic Connector Identification Dataset v1.1.0. Download full dataset.

Standards Register

Current edition status and new-design instructions for each governing standard, verified July 29, 2026. Source: hydraulic-standards-register-2026-07-29.csv.

Hydraulic fitting standards register — current edition and lifecycle status, verified July 29, 2026
Family / standard	Governing document	Issuer	Current edition / status	New-design instruction	Tier
JIC 37°	SAE J514-1; ISO 8434-2	SAE / ISO	SAE J514-1_202606 (June 2026); ISO 8434-2:2007 (replacement in development)	None stated on public SAE scope page	★
SAE 45°	SAE J512	SAE	SAE J512_202511 (November 2025)	None stated on public SAE scope page	★
SAE ORB	SAE J1926/1, /2, /3	SAE	J1926/1_202301; /2_202303; /3_202305	SAE J1926/2: only ISO 6149 shall be used for new hydraulic threaded-port/stud-end designs	★
ORFS	SAE J1453/1, /2, /3; ISO 8434-3	SAE / ISO	SAE J1453/1_201906; /2_201504; /3_201206; ISO 8434-3:2005	ISO 8434-3: metric tubing preferred for new ORFS designs	★
NPTF / NPSM	SAE J514/3	SAE	SAE J514/3_202312 (December 2023)	None stated on public SAE scope page	★
BSPP (G)	ISO 228-1	ISO	ISO 228-1:2000, confirmed 2022	ISO/TC 131/SC 4 recommends ISO 6149 for new hydraulic threaded-port designs	★
BSPT (R/Rc)	ISO 7-1	ISO	ISO 7-1:1994, confirmed 2026; Cor 1:2007	None stated in public ISO abstract	★
DIN 24° (L & H)	ISO 8434-1	ISO	ISO 8434-1:2018, confirmed 2024; revision in development	ISO 8434-1: elastomeric-seal connector designs preferred where permitted	★
SAE Flareless 24°	SAE J514/2	SAE	SAE J514/2_202404 (April 2024)	ISO 8434-1 preference for elastomeric seals applies to equivalent metric design	★
ISO 6149 Metric O-ring	ISO 6149-1	ISO	ISO 6149-1:2022 (edition 4; replaced 2019 edition)	Recommended for new hydraulic threaded-port designs per SAE J1926/2 and ISO/TC 131/SC 4	★
ISO 9974 Metric port	ISO 9974-1	ISO	ISO 9974-1:1996, confirmed 2021; under review 2026	SAE J1926/2 and ISO/TC 131/SC 4 direct new designs to ISO 6149 instead	★
JIS BSPP 30°	JIS B 8363; JIS B 0202	JSA	JIS B 8363:2015; JIS B 0202:1999 (listed in current JSA materials)	No new-design claim published here	●
Komatsu 30° metric	Manufacturer family	Mfr.	Current Danfoss Z-series offering, verified July 2026	No consensus-standard claim made	●

Download: hydraulic-standards-register-2026-07-29.csv — SHA-256: 5a65728c6bc13d76d4b39a910446d04848a9d0e14997c86a537676ad39c787a0

Dataset Download

The full dataset is published in CSV and JSON formats. Both files are identical in content; the JSON includes complete metadata. Files are served from this domain and are free to use under CC BY 4.0 — attribution to Memphis Hydraulic Hose Repair Research and a link to this page.

hydraulic-connector-identification-2026-07-29.csv

155 size records + 2 routing rules — all 17 families

SHA-256: 4776ecebe4ce46857b15c3fb822f7cc2fae47cba917f9196e1f717372026ccbb

CSV

hydraulic-connector-identification-2026-07-29.json

Same records plus dataset metadata and source provenance

SHA-256: 85cc67c1d2211ed4de2934c03b8c3e0c4de1e926f9fc810e6716ce5d8d3f180e

JSON

hydraulic-standards-register-2026-07-29.csv

20-row standards and provenance register — edition status and new-design notes

SHA-256: 5a65728c6bc13d76d4b39a910446d04848a9d0e14997c86a537676ad39c787a0

CSV

hydraulic-connector-identification-2026-07-29-README.txt

Dataset README — scope, verification tiers, SHA-256 checksums

TXT

Dataset version: 1.1.0. Publisher: Memphis Hydraulic Hose Repair Research. Verified: July 29, 2026. 122 records are directly verified against official standards-issuer records (★); 35 records are retained from official manufacturer technical tables with stated limitations (●).

Verification Tiers

Each size record carries one of two verification tiers sourced from the dataset README:

★: Exact field row and family semantics read from an official standards-issuer page or official manufacturer technical table; current standard identity and status checked where applicable. 122 records carry this tier.
●: Official manufacturer-published row retained with a stated limitation; exact consensus-standard membership is not asserted. 35 records carry this tier (JIS BSPP 30°, Komatsu 30° metric, DIN 24° Light, DIN 24° Heavy).

Primary Sources

All outbound links are direct links to the referenced primary source. No affiliate or sponsored relationship with any source.

Danfoss Brass Products Global Catalog — NPTF, NPSM, JIC 37°, SAE 45°, BSPP, and BSPT field-identification tables. Version/status: AF444058498934en-000103.
Danfoss Z Series Braided Hose Ends Quick Reference — JIS 30°, Komatsu/Link-Belt 30°, and DIN 24° manufacturer rows. Version/status: AV452872609750en-000102.
Parker Catalog 4300, PDF Version 12 — 11/2025 — SAE flareless, ORFS manufacturer rows and extension notes. Version/status: Version 12, November 2025.
Parker Port End Assembly Guide — SAE ORB, ISO 9974, and ISO 6149 thread rows and sealing semantics. Version/status: Current as of verification date.
SAE J514-1_202606 — JIC 37° family status confirmation. Version/status: Revised June 2026.
SAE J512_202511 — SAE 45° family status confirmation. Version/status: Revised November 2025.
SAE J1926/2_202303 — SAE ORB new-design instruction directing to ISO 6149. Version/status: March 2023.
SAE J1453/1_201906 — ORFS family status confirmation. Version/status: June 2019.
ISO 8434-1:2018 — DIN 24° and SAE flareless 24° (ISO equivalent) family status. Version/status: Confirmed 2024.
ISO 6149-1:2022 (edition 4) — ISO 6149 metric O-ring port standard status. Version/status: Edition 4, 2022.
ISO 9974-1:1996 (confirmed 2021) — ISO 9974 metric port standard status. Version/status: Confirmed 2021; under review 2026.
ISO 228-1:2000 (confirmed 2022) — BSPP family status. Version/status: Confirmed 2022.
ISO 7-1:1994 (confirmed 2026) — BSPT family status. Version/status: Confirmed 2026.

Frequently Asked Questions

How do I tell a JIC 37° fitting apart from a SAE 45° fitting by eye?: Six dash sizes share identical thread designations and pitches (−02 through −05, −08, and −10). The only field discriminator is the seat angle: 37° on JIC connectors and 45° on SAE J512 connectors. Use a thread protractor or seat-angle gauge — visual estimation from the flare alone is not reliable.
Are JIC 37° and SAE 45° fittings interchangeable where they share the same thread?: No. A matching thread designation does not confirm interchangeability. The sealing geometry differs (37° vs 45° flare), and mixing the two can result in a leaking or structurally inadequate joint. Confirm the seat angle at the fitting before assembly.
What is the difference between NPTF and NPSM threads?: NPTF (dryseal tapered pipe thread) is tapered — the thread diameter increases along the length, and the pressure-tight seal is made by thread engagement. NPSM (straight mechanical joint pipe thread) is parallel — the same thread diameter along the length, and the seal is made at a 30° mechanical seat or chamfer outside the thread. Both use 60° inch pipe thread form and share nominal thread designations (e.g., 1/2-14), so taper confirmation is required.
What is the difference between SAE ORB and ORFS connectors?: SAE O-Ring Boss (ORB) seals with an O-ring beneath the male shoulder compressed into a port chamfer or spotface. O-Ring Face Seal (ORFS) seals with an O-ring in a groove machined into the flat male face, which seats against a flat female face. The thread designations overlap at many nominal sizes but use different pitch series — for example, the ORB −06 uses 9/16-18 and the ORFS −06 uses 11/16-16.
Can a BSPT male fitting thread into a BSPP female port?: The thread form (55° Whitworth) is the same, but BSPT is tapered and BSPP is parallel. A tapered male will enter a parallel female port, but the joint is not designed to seal this way. ISO 228-1 explicitly states that pressure-tightness in BSPP is not made on the thread itself — it requires a separate seal method at the face or with a bonded washer. Mixing taper and parallel pipe threads risks a leak or structural failure.
How do DIN 24° Light and Heavy series differ?: Both use 24° cone sealing geometry and share many of the same metric thread designations. The distinction is the tube outer diameter for which each series is intended — the Heavy series is designed for higher-pressure applications with heavier tube walls at the same thread size. This dataset records manufacturer-confirmed thread and major-diameter fields; it does not resolve Light vs Heavy from thread designation alone. Tube OD and application pressure must be confirmed at the assembly.
What is the difference between ISO 6149 and ISO 9974 metric ports?: Both use ISO metric parallel thread. ISO 6149 seals with an O-ring compressed into a port chamfer (truncated housing) beneath the male shoulder — the O-ring is visible at the shoulder. ISO 9974 seals at the port face using a sealing washer, elastomeric seal, or metal-to-metal face contact — not an O-ring under the shoulder. ISO 6149 is the recommended family for new hydraulic threaded-port designs per SAE J1926/2 and ISO/TC 131/SC 4. A metal-to-metal port face or a washer seat indicates ISO 9974.

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Publication: Memphis Hydraulic Hose Repair Research
Title: Hydraulic Fitting Identification Tool | 17 Families, 155 Records
URL: https://memphishydraulichoserepair.com/resources/hydraulic-fitting-identification-tool/
Dataset version: 1.1.0
Last updated/verified: July 29, 2026
License: CC BY 4.0 — creativecommons.org/licenses/by/4.0/

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Last updated and verified: July 29, 2026. Dataset version 1.1.0. Publisher: Memphis Hydraulic Hose Repair Research, operated by Kozi Publishing LLC.