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A51E9102-31 — COUPLING HALF,QUICK DISCONNECT

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

A51E9102-31: COUPLING HALF,QUICK DISCONNECT.

The COUPLING HALF,QUICK DISCONNECT is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY BODY, leg_length: 0.625 INCHES NOMINAL IN, seat_angle: 12.0 DEGREES, thread_class: 3A ALL ENDS A, overall_length: 2.270 INCHES MINIMUM AND 2.400 INCHES MAXIMUM IN, connection_style: FLARELESS ALL ENDS. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-006-4322, 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
A51E9102-31
NSN: 4730-00-006-4322
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 61174 — NORTHROP GRUMMAN SYSTEMS CORPORATION DBA NORTHROP GRUMMAN SYSTEMS CORP DIV NORTHROP GRUMMAN AERONAUTICS SYSTEMS (USA)
SPECIFICATIONS
materialALUMINUM ALLOY BODY
leg_length0.625 INCHES NOMINAL IN
seat_angle12.0 DEGREES
thread_class3A ALL ENDS A
overall_length2.270 INCHES MINIMUM AND 2.400 INCHES MAXIMUM IN
connection_styleFLARELESS ALL ENDS
style_designatorMALE COUPLING HALF
features_providedSELF-SEALING
surface_treatmentANODIZE BODY
nominal_thread_size0.875 INCHES ALL ENDS IN
quick_disconnect_methodSPRING PUSH-PULL ALL ENDS
thread_series_designatorUNIFIED NATIONAL JOINT FINE (UNJF) ALL ENDS
NSN4730-00-006-4322
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: A51E9102-31 · 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: FLARELESS ALL ENDS
•
STYLE DESIGNATOR: MALE COUPLING HALF
•
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 0.625 INCHES ALL ENDS IN
•
QUICK DISCONNECT NOMINAL SIZE: 0.844 INCHES ALL ENDS IN
•
LEG LENGTH: 0.625 INCHES NOMINAL IN
•
FEATURES PROVIDED: SELF-SEALING
•
NOMINAL THREAD SIZE: 0.875 INCHES ALL ENDS IN
TECHNICAL CHARACTERISTICS
CONNECTION STYLEFLARELESS ALL ENDS
STYLE DESIGNATORMALE COUPLING HALF
OVERALL LENGTH2.270 INCHES MINIMUM AND 2.400 INCHES MAXIMUM IN
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.625 INCHES ALL ENDS IN
QUICK DISCONNECT NOMINAL SIZE0.844 INCHES ALL ENDS IN
LEG LENGTH0.625 INCHES NOMINAL IN
FEATURES PROVIDEDSELF-SEALING
NOMINAL THREAD SIZE0.875 INCHES ALL ENDS IN
SEAT ANGLE12.0 DEGREES
SURFACE TREATMENTANODIZE BODY
SUBSTITUTES & CROSS-REFERENCES 1
4587-36Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is A51E9102-31?
A51E9102-31 is a COUPLING HALF,QUICK DISCONNECT.
What parts can replace A51E9102-31?
There is 1 known substitute for A51E9102-31: 4587-36. Substitute compatibility should be verified for your specific system.
What is the NSN for A51E9102-31?
A51E9102-31 is cataloged in the U.S. Government catalog under NSN 4730-00-006-4322. 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.