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3777-12 — COUPLING HALF,QUICK DISCONNECT

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

3777-12: COUPLING HALF,QUICK DISCONNECT.

The COUPLING HALF,QUICK DISCONNECT is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY BODY, leg_length: 0.365 INCHES MAXIMUM IN, seat_angle: 37.0 DEGREES, thread_class: 3A ALL ENDS A, overall_length: 1.250 INCHES MAXIMUM IN, connection_type: THREADED EXTERNAL TUBE FIRST FLUID END CONNECTION. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-273-1319, 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
3777-12
NSN: 4730-01-273-1319
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 00624 — EATON AEROQUIP LLC DBA JACKSON NORTH 1 DIV FLUID AND ELECTRICAL DISTRIBUTION (USA)
SPECIFICATIONS
materialALUMINUM ALLOY BODY
leg_length0.365 INCHES MAXIMUM IN
seat_angle37.0 DEGREES
thread_class3A ALL ENDS A
overall_length1.250 INCHES MAXIMUM IN
connection_typeTHREADED EXTERNAL TUBE FIRST FLUID END CONNECTION
connection_styleFLARED ALL ENDS
style_designatorMALE COUPLING HALF
surface_treatmentANODIZE BODY
nominal_thread_size1.188 INCHES ALL ENDS IN
quick_disconnect_methodTWIST-LOCK ALL ENDS
thread_series_designatorUNEF ALL ENDS
NSN4730-01-273-1319
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 3777-12 · 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 TY2 CLASS2 MIL SPEC SINGLE TREATMENT RESPONSE BODY
•
CONNECTION STYLE: FLARED ALL ENDS
•
CONNECTION TYPE: THREADED EXTERNAL TUBE FIRST FLUID END CONNECTION
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STYLE DESIGNATOR: MALE COUPLING HALF
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-225 FED SPEC SINGLE MATERIAL RESPONSE BODY
•
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 1.468 INCHES ALL ENDS IN
•
LEG LENGTH: 0.365 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625 TY2 CLASS2 MIL SPEC SINGLE TREATMENT RESPONSE BODY
CONNECTION STYLEFLARED ALL ENDS
CONNECTION TYPETHREADED EXTERNAL TUBE FIRST FLUID END CONNECTION
STYLE DESIGNATORMALE COUPLING HALF
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-225 FED SPEC SINGLE MATERIAL RESPONSE BODY
OVERALL LENGTH1.250 INCHES MAXIMUM IN
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED1.468 INCHES ALL ENDS IN
LEG LENGTH0.365 INCHES MAXIMUM IN
NOMINAL THREAD SIZE1.188 INCHES ALL ENDS IN
SEAT ANGLE37.0 DEGREES
SUBSTITUTES & CROSS-REFERENCES 1
114608Reference document
Same NSN cross-reference
Reference document — Vendor item drawing reference
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 3777-12?
3777-12 is a COUPLING HALF,QUICK DISCONNECT.
What parts can replace 3777-12?
There is 1 known substitute for 3777-12: 114608. Substitute compatibility should be verified for your specific system.
What is the NSN for 3777-12?
3777-12 is cataloged in the U.S. Government catalog under NSN 4730-01-273-1319. 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.