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A51P91122-401 — COUPLING ASSEMBLY,QUICK DISCONNE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

A51P91122-401: COUPLING ASSEMBLY,QUICK DISCONNE.

COUPLING ASSEMBLY,QUICK DISCONNE. Key specifications include material: ALUMINUM ALLOY OVERALL, flow_angle: 37.0 DEGREES, exterior_color: WHITE, connection_type: THREADED INTERNAL TUBE FIRST FLUID END CONNECTION, special_features: SELF LOCKING, WITH ELECTRICAL BONDING DEVICE, quick_disconnect_method: QUICK LEAD THREAD ALL ENDS. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-031-4039, 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
A51P91122-401
NSN: 4730-01-031-4039
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 79RG9 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialALUMINUM ALLOY OVERALL
flow_angle37.0 DEGREES
exterior_colorWHITE
connection_typeTHREADED INTERNAL TUBE FIRST FLUID END CONNECTION
special_featuresSELF LOCKING, WITH ELECTRICAL BONDING DEVICE
quick_disconnect_methodQUICK LEAD THREAD ALL ENDS
NSN4730-01-031-4039
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: A51P91122-401 · 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
•
FLOW ANGLE: 37.0 DEGREES
•
CONNECTION TYPE: THREADED INTERNAL TUBE FIRST FLUID END CONNECTION
•
EXTERIOR COLOR: WHITE
•
MATERIAL: ALUMINUM ALLOY OVERALL
•
QUICK DISCONNECT METHOD: QUICK LEAD THREAD ALL ENDS
TECHNICAL CHARACTERISTICS
FLOW ANGLE37.0 DEGREES
CONNECTION TYPETHREADED INTERNAL TUBE FIRST FLUID END CONNECTION
EXTERIOR COLORWHITE
SPECIAL FEATURESSELF LOCKING, WITH ELECTRICAL BONDING DEVICE
MATERIALALUMINUM ALLOY OVERALL
QUICK DISCONNECT METHODQUICK LEAD THREAD 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
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is A51P91122-401?
A51P91122-401 is a COUPLING ASSEMBLY,QUICK DISCONNE.
What is the NSN for A51P91122-401?
A51P91122-401 is cataloged in the U.S. Government catalog under NSN 4730-01-031-4039. 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.