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ML3K21S — COUPLING HALF,QUICK DISCONNECT

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

ML3K21S: COUPLING HALF,QUICK DISCONNECT.

The COUPLING HALF,QUICK DISCONNECT is a the manufacturer industrial component. Key specifications include material: STEEL BODY, overall_length: 1.750 INCHES NOMINAL IN, connection_type: THREADED INTERNAL PIPE FIRST FLUID END CONNECTION, connection_style: PLAIN ALL ENDS, style_designator: MALE COUPLING HALF, features_provided: SELF-SEALING. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-394-9743, 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
ML3K21S
NSN: 4730-00-394-9743
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 73061 — HANSEN MFG CO INC (USA)
SPECIFICATIONS
materialSTEEL BODY
overall_length1.750 INCHES NOMINAL IN
connection_typeTHREADED INTERNAL PIPE FIRST FLUID END CONNECTION
connection_stylePLAIN ALL ENDS
style_designatorMALE COUPLING HALF
features_providedSELF-SEALING
surface_treatmentPASSIVATE BODY
nominal_thread_size0.375 INCHES ALL ENDS IN
quick_disconnect_methodPUSH-PULL ALL ENDS
thread_series_designatorNPT ALL ENDS
mating_end_identificationU.S.ARMY MISSILE COMMAND COUPLING HALF,QUICK DISCONNECT,PART NO.10293006
nominal_pipe_size_accommodated0.375 INCHES ALL ENDS IN
NSN4730-00-394-9743
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: ML3K21S · 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
•
NOMINAL PIPE SIZE ACCOMMODATED: 0.375 INCHES ALL ENDS IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE BODY
•
CONNECTION STYLE: PLAIN ALL ENDS
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MATING END IDENTIFICATION: U.S.ARMY MISSILE COMMAND COUPLING HALF,QUICK DISCONNECT,PART NO.10293006
•
CONNECTION TYPE: THREADED INTERNAL PIPE FIRST FLUID END CONNECTION
•
STYLE DESIGNATOR: MALE COUPLING HALF
•
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD SINGLE MATERIAL RESPONSE BODY
TECHNICAL CHARACTERISTICS
NOMINAL PIPE SIZE ACCOMMODATED0.375 INCHES ALL ENDS IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE BODY
CONNECTION STYLEPLAIN ALL ENDS
MATING END IDENTIFICATIONU.S.ARMY MISSILE COMMAND COUPLING HALF,QUICK DISCONNECT,PART NO.10293006
CONNECTION TYPETHREADED INTERNAL PIPE FIRST FLUID END CONNECTION
CONNECTION TYPEEXTERNAL QUICK DISCONNECT ALL ENDS
STYLE DESIGNATORMALE COUPLING HALF
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD SINGLE MATERIAL RESPONSE BODY
OVERALL LENGTH1.750 INCHES NOMINAL IN
FEATURES PROVIDEDSELF-SEALING
SUBSTITUTES & CROSS-REFERENCES 3
LL3-K21Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
ML3K21Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
10293007Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is ML3K21S?
ML3K21S is a COUPLING HALF,QUICK DISCONNECT.
What parts can replace ML3K21S?
There are 3 known substitutes for ML3K21S: LL3-K21, ML3K21, 10293007. Substitute compatibility should be verified for your specific system.
What is the NSN for ML3K21S?
ML3K21S is cataloged in the U.S. Government catalog under NSN 4730-00-394-9743. This indicates validated use in U.S. government and defense supply chains.
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