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3921316 — ADAPTER,STRAIGHT,PIPE TO TUBE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

3921316: ADAPTER,STRAIGHT,PIPE TO TUBE.

The ADAPTER,STRAIGHT,PIPE TO TUBE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, connection_type: THREADED EXTERNAL TUBE ALL ENDS, nominal_thread_size: 0.500 INCHES ALL ENDS IN, end_item_identification: CUMMINS SIX CYLINDER FUEL LINE SYSTEM, media_for_which_designed: FUEL SINGLE RESPONSE, thread_series_designator: UNF ALL ENDS. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-412-1173, 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
3921316
NSN: 4730-01-412-1173
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 15434 — CUMMINS INC. (USA)
SPECIFICATIONS
materialSTEEL OVERALL
connection_typeTHREADED EXTERNAL TUBE ALL ENDS
nominal_thread_size0.500 INCHES ALL ENDS IN
end_item_identificationCUMMINS SIX CYLINDER FUEL LINE SYSTEM
media_for_which_designedFUEL SINGLE RESPONSE
thread_series_designatorUNF ALL ENDS
NSN4730-01-412-1173
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 3921316 · 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 TYPE: THREADED EXTERNAL TUBE ALL ENDS
•
NOMINAL THREAD SIZE: 0.500 INCHES ALL ENDS IN
•
MEDIA FOR WHICH DESIGNED: FUEL SINGLE RESPONSE
•
MATERIAL: STEEL OVERALL
•
THREAD SERIES DESIGNATOR: UNF ALL ENDS
TECHNICAL CHARACTERISTICS
CONNECTION TYPETHREADED EXTERNAL TUBE ALL ENDS
NOMINAL THREAD SIZE0.500 INCHES ALL ENDS IN
MEDIA FOR WHICH DESIGNEDFUEL SINGLE RESPONSE
END ITEM IDENTIFICATIONCUMMINS SIX CYLINDER FUEL LINE SYSTEM
MATERIALSTEEL OVERALL
THREAD SERIES DESIGNATORUNF ALL ENDS
OTHER ITEMS IN FSC 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4730-00-000-1895 4730-00-000-4289 4730-00-000-4445 4730-00-000-8373 4730-00-000-8897 4730-00-001-0007 4730-00-001-0008
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 3921316?
3921316 is a ADAPTER,STRAIGHT,PIPE TO TUBE.
What is the NSN for 3921316?
3921316 is cataloged in the U.S. Government catalog under NSN 4730-01-412-1173. 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.