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656294-03 — COUPLING HALF,QUICK DISCONNECT

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

656294-03: COUPLING HALF,QUICK DISCONNECT.

The COUPLING HALF,QUICK DISCONNECT is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY BODY, seat_angle: 12.0 DEGREES, thread_class: 3A ALL ENDS A, overall_length: 1.588 INCHES NOMINAL IN, connection_type: THREADED EXTERNAL TUBE FIRST FLUID END CONNECTION, connection_style: FLARELESS ALL ENDS. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-383-5909, 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
656294-03
NSN: 4730-01-383-5909
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 82577 — RAYTHEON COMPANY DBA RAYTHEON (USA)
SPECIFICATIONS
materialALUMINUM ALLOY BODY
seat_angle12.0 DEGREES
thread_class3A ALL ENDS A
overall_length1.588 INCHES NOMINAL IN
connection_typeTHREADED EXTERNAL TUBE FIRST FLUID END CONNECTION
connection_styleFLARELESS ALL ENDS
style_designatorMALE COUPLING HALF
surface_treatmentANODIZE BODY
nominal_thread_size0.563 INCHES ALL ENDS IN
quick_disconnect_methodPUSH-PULL ALL ENDS
thread_series_designatorUNIFIED NATIONAL JOINT FINE (UNJF) ALL ENDS
quick_disconnect_nominal_size0.375 INCHES ALL ENDS IN
NSN4730-01-383-5909
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 656294-03 · 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
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-A-8625,TY II,CL 2 MIL SPEC SINGLE TREATMENT RESPONSE BODY
•
CONNECTION STYLE: FLARELESS ALL ENDS
•
CONNECTION TYPE: THREADED EXTERNAL TUBE FIRST FLUID END CONNECTION
•
STYLE DESIGNATOR: MALE COUPLING HALF
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-225/6 FED SPEC SINGLE MATERIAL RESPONSE BODY
•
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 0.375 INCHES ALL ENDS IN
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625,TY II,CL 2 MIL SPEC SINGLE TREATMENT RESPONSE BODY
CONNECTION STYLEFLARELESS ALL ENDS
CONNECTION TYPETHREADED EXTERNAL TUBE FIRST FLUID END CONNECTION
CONNECTION TYPEEXTERNAL QUICK DISCONNECT ALL ENDS
STYLE DESIGNATORMALE COUPLING HALF
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-225/6 FED SPEC SINGLE MATERIAL RESPONSE BODY
OVERALL LENGTH1.588 INCHES NOMINAL IN
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.375 INCHES ALL ENDS IN
QUICK DISCONNECT NOMINAL SIZE0.375 INCHES ALL ENDS IN
NOMINAL THREAD SIZE0.563 INCHES ALL ENDS IN
SUBSTITUTES & CROSS-REFERENCES 1
656294Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
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 656294-03?
656294-03 is a COUPLING HALF,QUICK DISCONNECT.
What parts can replace 656294-03?
There is 1 known substitute for 656294-03: 656294. Substitute compatibility should be verified for your specific system.
What is the NSN for 656294-03?
656294-03 is cataloged in the U.S. Government catalog under NSN 4730-01-383-5909. 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.