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81.98126-0037 — Technical Data Sheet

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— · HOSE FITTING
WHAT YOU NEED TO KNOW
PTFE tape on tapered threads (NPT/BSPT) JIC/AN flare connections seal metal-to-metal — no tape
NPT != BSPT — look identical, NOT interchangeable
PRODUCT OVERVIEW

The COUPLING HALF,SELF-SEALING is a the manufacturer industrial component. Key specifications include material: STEEL BODY, thread_class: 2A ALL ENDS A, overall_length: 1.375 INCHES NOMINAL IN, connection_type: THREADED EXTERNAL BOSS FIRST FLUID END CONNECTION, connection_style: EXTERNAL SEAT FOR GASKET SEAL ALL ENDS, style_designator: MALE COUPLING HALF. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System under NSN 4730-00-613-9863, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
81.98126-0037
NSN: 4730-00-613-9863
FSC: 4730
CAGE: D3273 — MAN TRUCK & BUS SE (DEU)
SPECIFICATIONS
materialSTEEL BODY
thread_class2A ALL ENDS A
overall_length1.375 INCHES NOMINAL IN
connection_typeTHREADED EXTERNAL BOSS FIRST FLUID END CONNECTION
connection_styleEXTERNAL SEAT FOR GASKET SEAL ALL ENDS
style_designatorMALE COUPLING HALF
basic_shape_styleHEXAGON W/OUT BOLT HOLES MOUNTING FLANGE
nominal_thickness0.188 INCHES IN
surface_treatmentCADMIUM BODY
nominal_thread_size1.000 INCHES ALL ENDS IN
mounting_flange_locationFIRST LEG
thread_series_designatorUNEF ALL ENDS
NSN4730-00-613-9863
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 81.98126-0037 · OEM ⚠ VERIFY BEFORE ORDERING NPT ≠ BSPT — tapered threads look identical but are NOT interchangeable. Wrong thread = leak. JIC (37°) ≠ AN (37°) ≠ SAE 45° — flare angles must match exactly. Measure thread pitch with gauge — visual identification is unreliable ✓ BROKER TIP Always use thread sealant (PTFE tape or pipe compound) on tapered threads (NPT/BSPT). JIC/AN flare fittings seal metal-to-metal — never use tape on flare connections PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
STYLE DESIGNATOR: MALE COUPLING HALF
•
MOUNTING FLANGE LOCATION: FIRST LEG
•
NOMINAL THREAD SIZE: 1.000 INCHES ALL ENDS IN
•
NOMINAL WIDTH ACROSS FLATS: 1.125 INCHES IN
•
CONNECTION TYPE: THREADED EXTERNAL BOSS FIRST FLUID END CONNECTION
•
THREAD CLASS: 2A ALL ENDS A
•
NOMINAL THICKNESS: 0.188 INCHES IN
•
SURFACE TREATMENT: CADMIUM BODY
TECHNICAL CHARACTERISTICS
STYLE DESIGNATORMALE COUPLING HALF
MOUNTING FLANGE LOCATIONFIRST LEG
NOMINAL THREAD SIZE1.000 INCHES ALL ENDS IN
NOMINAL WIDTH ACROSS FLATS1.125 INCHES IN
CONNECTION TYPETHREADED EXTERNAL BOSS FIRST FLUID END CONNECTION
THREAD CLASS2A ALL ENDS A
NOMINAL THICKNESS0.188 INCHES IN
SURFACE TREATMENTCADMIUM BODY
BASIC SHAPE STYLEHEXAGON W/OUT BOLT HOLES MOUNTING FLANGE
THREAD SERIES DESIGNATORUNEF ALL ENDS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
16-00-8305InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
845-2445071ITEM9InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
5400-S2-8InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
503-4556027InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
2670-57InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
2670-57 ITEM 9InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVEGOVERNMENT REGISTRY
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 81.98126-0037?
81.98126-0037 is a COUPLING HALF,SELF-SEALING.
What parts can replace 81.98126-0037?
There are 11 known substitutes for 81.98126-0037: 16-00-8305, 845-2445071ITEM9, 5400-S2-8 and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 81.98126-0037?
81.98126-0037 is cataloged in the Federal Logistics Information System under NSN 4730-00-613-9863. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: September 2026