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4007998 — COUPLING,PIPE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

4007998: COUPLING,PIPE.

The COUPLING,PIPE is a the manufacturer industrial component. Key specifications include special_features: USED ON FIRE SUPPRESSION ASSEMBLY HOSES AND FITTINGS MK2, end_item_identification: END ITEM NSN: 2320-01-531-6425; TRUCK, BOMB SERVICE; TACTICAL (WHEELED) ARMORED SECURITY VEHICLE. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-554-8606, 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
4007998
NSN: 4730-01-554-8606
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 1EFH8 — GENERAL DYNAMICS LAND SYSTEMS - FORCE PROTECTION INC. DBA GDLS DIV GDLS-FP (USA)
SPECIFICATIONS
special_featuresUSED ON FIRE SUPPRESSION ASSEMBLY HOSES AND FITTINGS MK2
end_item_identificationEND ITEM NSN: 2320-01-531-6425; TRUCK, BOMB SERVICE; TACTICAL (WHEELED) ARMORED SECURITY VEHICLE
NSN4730-01-554-8606
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 4007998 · 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
TECHNICAL CHARACTERISTICS
SPECIAL FEATURESUSED ON FIRE SUPPRESSION ASSEMBLY HOSES AND FITTINGS MK2
END ITEM IDENTIFICATIONEND ITEM NSN: 2320-01-531-6425; TRUCK, BOMB SERVICE; TACTICAL (WHEELED) ARMORED SECURITY VEHICLE
SUBSTITUTES & CROSS-REFERENCES 1
5-4-FTX-SSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 4007998?
4007998 is a COUPLING,PIPE.
What parts can replace 4007998?
There is 1 known substitute for 4007998: 5-4-FTX-S. Substitute compatibility should be verified for your specific system.
What is the NSN for 4007998?
4007998 is cataloged in the U.S. Government catalog under NSN 4730-01-554-8606. 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.