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6536K21 — COUPLING HALF,QUICK DISCONNECT

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

6536K21: COUPLING HALF,QUICK DISCONNECT.

The COUPLING HALF,QUICK DISCONNECT is a the manufacturer industrial component. Key specifications include leg_length: 1.0875 INCHES NOMINAL IN, overall_length: 2.360 INCHES NOMINAL IN, special_features: WEAPON SYSTEM ESSENTIAL; QDC ID .438 IN, BODY SIZE .25 IN IN, style_designator: MALE COUPLING HALF, features_provided: SELF-SEALING, end_item_identification: SHIP; APU AIR ASSEMBLY. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-514-6676, 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
6536K21
NSN: 4730-01-514-6676
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 2V507 — MCMASTER-CARR SUPPLY COMPANY (USA)
SPECIFICATIONS
leg_length1.0875 INCHES NOMINAL IN
overall_length2.360 INCHES NOMINAL IN
special_featuresWEAPON SYSTEM ESSENTIAL; QDC ID .438 IN, BODY SIZE .25 IN IN
style_designatorMALE COUPLING HALF
features_providedSELF-SEALING
end_item_identificationSHIP; APU AIR ASSEMBLY
criticality_code_justificationFEAT
NSN4730-01-514-6676
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 6536K21 · 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
•
CRITICALITY CODE JUSTIFICATION: FEAT
•
STYLE DESIGNATOR: MALE COUPLING HALF
•
LEG LENGTH: 1.0875 INCHES NOMINAL IN
•
FEATURES PROVIDED: SELF-SEALING
TECHNICAL CHARACTERISTICS
CRITICALITY CODE JUSTIFICATIONFEAT
STYLE DESIGNATORMALE COUPLING HALF
OVERALL LENGTH2.360 INCHES NOMINAL IN
LEG LENGTH1.0875 INCHES NOMINAL IN
FEATURES PROVIDEDSELF-SEALING
SPECIAL FEATURESWEAPON SYSTEM ESSENTIAL; QDC ID .438 IN, BODY SIZE .25 IN IN
END ITEM IDENTIFICATIONSHIP; APU AIR ASSEMBLY
SUBSTITUTES & CROSS-REFERENCES 1
6391450Reference 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 6536K21?
6536K21 is a COUPLING HALF,QUICK DISCONNECT.
What parts can replace 6536K21?
There is 1 known substitute for 6536K21: 6391450. Substitute compatibility should be verified for your specific system.
What is the NSN for 6536K21?
6536K21 is cataloged in the U.S. Government catalog under NSN 4730-01-514-6676. 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.