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PartsTable / COMPONENT / MIL-K-21120
MIL-K-21120 ✓ Verified by PartsTable
— · COMPONENT
WHAT YOU NEED TO KNOW
Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel
Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

The KEY,SOCKET HEAD SCREW is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, overall_length: 5.750 INCHES NOMINAL IN, long_arm_length: 6.250 INCHES NOMINAL IN, short_arm_length: 1.750 INCHES NOMINAL IN, style_designator: L-HANDLE, features_provided: NONMAGNETIC AND NONSPARKING. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5120-00-189-2979, 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
MIL-K-21120
NSN: 5120-00-189-2979
FSC: 5120
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
overall_length5.750 INCHES NOMINAL IN
long_arm_length6.250 INCHES NOMINAL IN
short_arm_length1.750 INCHES NOMINAL IN
style_designatorL-HANDLE
features_providedNONMAGNETIC AND NONSPARKING
wrenching_surface_size0.625 INCHES NOMINAL BOTH ENDS IN
wrenching_surface_shapeHEXAGON BOTH ENDS EXTERNAL
specification/standard_data05047-ASME B18.3 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
environmental_attribute_codePLASTICS REMOVAL IN THE MARINE ENVIRONMENT (PRIME) PRODUCT
NSN5120-00-189-2979
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available KEY,SOCKET HEAD SCREW TITLE COMPONENT PN MIL-K-21120 MFR KEY,SOCKET HEAD SCREW
KEY FEATURES
•
LONG ARM LENGTH: 7.250 INCHES NOMINAL IN
•
STYLE DESIGNATOR: L-HANDLE
•
WRENCHING SURFACE SHAPE: HEXAGON BOTH ENDS EXTERNAL
•
SHORT ARM LENGTH: 2.250 INCHES NOMINAL IN
•
WRENCHING SURFACE SIZE: 0.875 INCHES NOMINAL BOTH ENDS IN
•
MATERIAL: COPPER ALLOY OVERALL
•
FEATURES PROVIDED: NONMAGNETIC AND NONSPARKING
TECHNICAL CHARACTERISTICS (FLIS)
LONG ARM LENGTH7.250 INCHES NOMINAL IN
STYLE DESIGNATORL-HANDLE
WRENCHING SURFACE SHAPEHEXAGON BOTH ENDS EXTERNAL
SHORT ARM LENGTH2.250 INCHES NOMINAL IN
WRENCHING SURFACE SIZE0.875 INCHES NOMINAL BOTH ENDS IN
MATERIALCOPPER ALLOY OVERALL
FEATURES PROVIDEDNONMAGNETIC AND NONSPARKING
OVERALL LENGTH8.125 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 26
70-59Interchangeable
interchangeable cross-reference
interchangeable
LRL50N-MInterchangeable
interchangeable cross-reference
interchangeable
WC586Interchangeable
interchangeable cross-reference
interchangeable
ND17H1Interchangeable
interchangeable cross-reference
interchangeable
319696-591Interchangeable
interchangeable cross-reference
interchangeable
17WEInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MIL-K-21120?
MIL-K-21120 is a KEY,SOCKET HEAD SCREW.
What parts can replace MIL-K-21120?
There are 26 known substitutes for MIL-K-21120: 70-59, LRL50N-M, WC586 and 23 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MIL-K-21120?
MIL-K-21120 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5120-00-189-2979. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026