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6-K31-143 — COUPLING HALF,QUICK DISCONNECT

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

6-K31-143: COUPLING HALF,QUICK DISCONNECT.

The COUPLING HALF,QUICK DISCONNECT is a the manufacturer industrial component. Key specifications include leg_length: 0.670 INCHES NOMINAL IN, overall_length: 2.360 INCHES NOMINAL IN, special_features: VITON SEAL -143 COMPOUND, style_designator: MALE COUPLING HALF, features_provided: SELF-SEALING. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-149-4989, 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
6-K31-143
NSN: 4730-01-149-4989
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 73992 — TUTHILL CORP HANSEN COUPLING DIV (USA)
SPECIFICATIONS
leg_length0.670 INCHES NOMINAL IN
overall_length2.360 INCHES NOMINAL IN
special_featuresVITON SEAL -143 COMPOUND
style_designatorMALE COUPLING HALF
features_providedSELF-SEALING
NSN4730-01-149-4989
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 6-K31-143 · 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
•
STYLE DESIGNATOR: MALE COUPLING HALF
•
LEG LENGTH: 0.670 INCHES NOMINAL IN
•
FEATURES PROVIDED: SELF-SEALING
TECHNICAL CHARACTERISTICS
STYLE DESIGNATORMALE COUPLING HALF
OVERALL LENGTH2.360 INCHES NOMINAL IN
LEG LENGTH0.670 INCHES NOMINAL IN
FEATURES PROVIDEDSELF-SEALING
SPECIAL FEATURESVITON SEAL -143 COMPOUND
SUBSTITUTES & CROSS-REFERENCES 2
H6-63YReference document
Same NSN cross-reference
Reference document — Secondary reference
426103Same 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 6-K31-143?
6-K31-143 is a COUPLING HALF,QUICK DISCONNECT.
What parts can replace 6-K31-143?
There are 2 known substitutes for 6-K31-143: H6-63Y, 426103. Substitute compatibility should be verified for your specific system.
What is the NSN for 6-K31-143?
6-K31-143 is cataloged in the U.S. Government catalog under NSN 4730-01-149-4989. 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.