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ML3K21BS-143 — COUPLING HALF,QUICK DISCONNECT

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

ML3K21BS-143: COUPLING HALF,QUICK DISCONNECT.

The COUPLING HALF,QUICK DISCONNECT is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, overall_length: 1.76 INCHES NOMINAL IN, special_features: BODY SIZE 3/8, COUPLING 1/2, QUICK DISCONNECT, HEIGHT 1.01 IN, IN, style_designator: FEMALE COUPLING HALF, part_name_assigned_by_controlling_agency: COUPLING HALF, QUICK DISCONNECT. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-663-1079, 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
ML3K21BS-143
NSN: 4730-01-663-1079
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 45X75 — DANFOSS POWER SOLUTIONS II, LLC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
overall_length1.76 INCHES NOMINAL IN
special_featuresBODY SIZE 3/8, COUPLING 1/2, QUICK DISCONNECT, HEIGHT 1.01 IN, IN
style_designatorFEMALE COUPLING HALF
part_name_assigned_by_controlling_agencyCOUPLING HALF, QUICK DISCONNECT
NSN4730-01-663-1079
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: ML3K21BS-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: FEMALE COUPLING HALF
•
MATERIAL: STEEL OVERALL
TECHNICAL CHARACTERISTICS
STYLE DESIGNATORFEMALE COUPLING HALF
OVERALL LENGTH1.76 INCHES NOMINAL IN
SPECIAL FEATURESBODY SIZE 3/8, COUPLING 1/2, QUICK DISCONNECT, HEIGHT 1.01 IN, IN
PART NAME ASSIGNED BY CONTROLLING AGENCYCOUPLING HALF, QUICK DISCONNECT
MATERIALSTEEL OVERALL
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

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is ML3K21BS-143?
ML3K21BS-143 is a COUPLING HALF,QUICK DISCONNECT.
What is the NSN for ML3K21BS-143?
ML3K21BS-143 is cataloged in the U.S. Government catalog under NSN 4730-01-663-1079. 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.