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K840734 — COUPLING HALF,QUICK DISCONNECT

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

K840734: COUPLING HALF,QUICK DISCONNECT.

The COUPLING HALF,QUICK DISCONNECT is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY AND COPPER ALLOY BODY, leg_length: 1.046 INCHES NOMINAL IN, seat_angle: 37.0 DEGREES, thread_class: 3A ALL ENDS A, overall_length: 2.125 INCHES MINIMUM AND 2.156 INCHES MAXIMUM IN, connection_type: EXTERNAL QUICK DISCONNECT ALL ENDS. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-684-7151, 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
K840734
NSN: 4730-00-684-7151
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 62228 — MEGGITT DEFENSE SYSTEMS, INC. DBA MEGGITT DEFENSE SYSTEMS INC (USA)
SPECIFICATIONS
materialALUMINUM ALLOY AND COPPER ALLOY BODY
leg_length1.046 INCHES NOMINAL IN
seat_angle37.0 DEGREES
thread_class3A ALL ENDS A
overall_length2.125 INCHES MINIMUM AND 2.156 INCHES MAXIMUM IN
connection_typeEXTERNAL QUICK DISCONNECT ALL ENDS
connection_styleFLARED ALL ENDS
special_featuresBULKHEAD THREADS ON FLUID CONNECTION END
style_designatorMALE COUPLING HALF
features_providedSAFETY LOCKING FEATURE AND SELF-SEALING
surface_treatmentANODIZE BODY
nominal_thread_size0.438 INCHES ALL ENDS IN
NSN4730-00-684-7151
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: K840734 · 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: FLARED ALL ENDS
•
CONNECTION TYPE: THREADED EXTERNAL TUBE FIRST FLUID END CONNECTION
•
STYLE DESIGNATOR: MALE COUPLING HALF
•
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 0.250 INCHES ALL ENDS IN
•
QUICK DISCONNECT NOMINAL SIZE: 0.722 INCHES ALL ENDS IN
•
LEG LENGTH: 1.046 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
CONNECTION STYLEFLARED ALL ENDS
CONNECTION TYPETHREADED EXTERNAL TUBE FIRST FLUID END CONNECTION
CONNECTION TYPEEXTERNAL QUICK DISCONNECT ALL ENDS
STYLE DESIGNATORMALE COUPLING HALF
OVERALL LENGTH2.125 INCHES MINIMUM AND 2.156 INCHES MAXIMUM IN
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.250 INCHES ALL ENDS IN
QUICK DISCONNECT NOMINAL SIZE0.722 INCHES ALL ENDS IN
LEG LENGTH1.046 INCHES NOMINAL IN
FEATURES PROVIDEDSAFETY LOCKING FEATURE AND SELF-SEALING
NOMINAL THREAD SIZE0.438 INCHES ALL ENDS IN
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 2
840734Reference document
Same NSN cross-reference
Reference document — Secondary reference
9062585Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 K840734?
K840734 is a COUPLING HALF,QUICK DISCONNECT.
What parts can replace K840734?
There are 2 known substitutes for K840734: 840734, 9062585. Substitute compatibility should be verified for your specific system.
What is the NSN for K840734?
K840734 is cataloged in the U.S. Government catalog under NSN 4730-00-684-7151. 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.