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2503178-001 — COUPLING ASSEMBLY,TUBE,FLEXIBLE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

2503178-001: COUPLING ASSEMBLY,TUBE,FLEXIBLE.

COUPLING ASSEMBLY,TUBE,FLEXIBLE. Key specifications include special_features: TWO CLAMPS INCLUDED, style_designator: FLEXIBLE COUPLING ASSEMBLY, end_item_identification: ENVIROVAC VACUUM TOILET ASSEMBLY,WALL MOUNTED P/N 5999014. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-442-1018, 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
2503178-001
NSN: 4730-01-442-1018
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 47WD8 — EVAC NORTH AMERICA INC (USA)
SPECIFICATIONS
special_featuresTWO CLAMPS INCLUDED
style_designatorFLEXIBLE COUPLING ASSEMBLY
end_item_identificationENVIROVAC VACUUM TOILET ASSEMBLY,WALL MOUNTED P/N 5999014
NSN4730-01-442-1018
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 2503178-001 · 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: FLEXIBLE COUPLING ASSEMBLY
TECHNICAL CHARACTERISTICS
STYLE DESIGNATORFLEXIBLE COUPLING ASSEMBLY
SPECIAL FEATURESTWO CLAMPS INCLUDED
END ITEM IDENTIFICATIONENVIROVAC VACUUM TOILET ASSEMBLY,WALL MOUNTED P/N 5999014
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 2503178-001?
2503178-001 is a COUPLING ASSEMBLY,TUBE,FLEXIBLE.
What is the NSN for 2503178-001?
2503178-001 is cataloged in the U.S. Government catalog under NSN 4730-01-442-1018. 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.