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40251-92 — ADAPTER,STRAIGHT,PIPE TO BOSS

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

40251-92: ADAPTER,STRAIGHT,PIPE TO BOSS.

The ADAPTER,STRAIGHT,PIPE TO BOSS is a the manufacturer industrial component. Key specifications include shape: RECTANGULAR, width: 3.0 INCHES NOMINAL IN, length: 4.0 INCHES NOMINAL IN, thickness: 0.30 INCHES NOMINAL IN, special_features: 0.2 OUNCES OZ, end_item_identification: HARLEY DAVIDSON MOTORCYCLE. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-133-9985, 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
40251-92
NSN: 4730-00-133-9985
NIINs: 001339985, 016011197
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 6N299 — AGCO CORP PARTS OPN (USA)
SPECIFICATIONS
shapeRECTANGULAR
width3.0 INCHES NOMINAL IN
length4.0 INCHES NOMINAL IN
thickness0.30 INCHES NOMINAL IN
special_features0.2 OUNCES OZ
end_item_identificationHARLEY DAVIDSON MOTORCYCLE
part_name_assigned_by_controlling_agencyPLATE, SPROCKET RETENTION
NSN4730-00-133-9985
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 40251-92 · 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
•
CONNECTION STYLE: EXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END
•
NOMINAL OVERALL LENGTH: 0.750 INCHES IN
•
NOMINAL THREAD SIZE: 0.750 INCHES SECOND END IN
•
THREAD CLASS: 2A SECOND END A
•
MATERIAL: STEEL OVERALL
•
THREAD SERIES DESIGNATOR: NPT FIRST END
TECHNICAL CHARACTERISTICS
CONNECTION STYLEEXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END
CONNECTION STYLEPLAIN (PIPE) FIRST END
NOMINAL OVERALL LENGTH0.750 INCHES IN
NOMINAL THREAD SIZE0.750 INCHES SECOND END IN
NOMINAL THREAD SIZE0.125 INCHES FIRST END IN
THREAD CLASS2A SECOND END A
MATERIALSTEEL OVERALL
THREAD SERIES DESIGNATORNPT FIRST END
THREAD SERIES DESIGNATORUNF SECOND END
SUBSTITUTES & CROSS-REFERENCES 1
4025192-8Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 40251-92?
40251-92 is a ADAPTER,STRAIGHT,PIPE TO BOSS.
What parts can replace 40251-92?
There is 1 known substitute for 40251-92: 4025192-8. Substitute compatibility should be verified for your specific system.
What is the NSN for 40251-92?
40251-92 is cataloged in the U.S. Government catalog under NSN 4730-00-133-9985. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.