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FDS121 ✓ 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 SOCKET,SOCKET WRENCH is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, overall_length: 1.930 INCHES MINIMUM IN, drive_end_shape: SQUARE SINGLE END INTERNAL, special_markings: 3/8 IN. IN, style_designator: INTERNAL-INTERNAL, features_provided: MANUAL TOOL.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5120-00-277-1463, 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
FDS121
NSN: 5120-00-277-1463
FSC: 5120
CAGE: 55719 — IDSC HOLDINGS LLC DIV SNAP-ON INDUSTRIAL, A DIV. OF IDSC HOLDINGS , LLC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
overall_length1.930 INCHES MINIMUM IN
drive_end_shapeSQUARE SINGLE END INTERNAL
special_markings3/8 IN. IN
style_designatorINTERNAL-INTERNAL
features_providedMANUAL TOOL
surface_treatmentCHROMIUM OVERALL
drive_surface_size0.375 INCHES NOMINAL SINGLE END IN
wrenching_surface_size0.375 INCHES NOMINAL SINGLE END IN
wrenching_surface_shape12 POINT SINGLE END INTERNAL
nondefinitive_spec/std_data1 TYPE AND 1 CLASS AND B STYLE
specification/standard_data0U583-SAE AS954 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
NSN5120-00-277-1463
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available SOCKET,SOCKET WRENCH TITLE COMPONENT PN FDS121 MFR SOCKET,SOCKET WRENCH
KEY FEATURES
•
WRENCHING SURFACE SIZE: 0.375 INCHES NOMINAL SINGLE END IN
•
WRENCHING SURFACE SHAPE: 12 POINT SINGLE END INTERNAL
•
SPECIFICATION/STANDARD DATA: 0U583-SAE AS954 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
•
FEATURES PROVIDED: MANUAL TOOL
•
MATERIAL: STEEL OVERALL
•
NONDEFINITIVE SPEC/STD DATA: 1 TYPE AND 1 CLASS AND B STYLE
•
STYLE DESIGNATOR: INTERNAL-INTERNAL
•
DRIVE END SHAPE: SQUARE SINGLE END INTERNAL
TECHNICAL CHARACTERISTICS (FLIS)
WRENCHING SURFACE SIZE0.375 INCHES NOMINAL SINGLE END IN
WRENCHING SURFACE SHAPE12 POINT SINGLE END INTERNAL
SPECIFICATION/STANDARD DATA0U583-SAE AS954 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
FEATURES PROVIDEDMANUAL TOOL
MATERIALSTEEL OVERALL
NONDEFINITIVE SPEC/STD DATA1 TYPE AND 1 CLASS AND B STYLE
STYLE DESIGNATORINTERNAL-INTERNAL
DRIVE END SHAPESQUARE SINGLE END INTERNAL
DRIVE SURFACE SIZE0.375 INCHES NOMINAL SINGLE END IN
SURFACE TREATMENTCHROMIUM OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 22
42412Interchangeable
interchangeable cross-reference
interchangeable
S38-78Interchangeable
interchangeable cross-reference
interchangeable
B107.1 CL1STBInterchangeable
interchangeable cross-reference
interchangeable
NBD-28Interchangeable
interchangeable cross-reference
interchangeable
B107.1Interchangeable
interchangeable cross-reference
interchangeable
GGG-W-641Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is FDS121?
FDS121 is a SOCKET,SOCKET WRENCH.
What parts can replace FDS121?
There are 22 known substitutes for FDS121: 42412, S38-78, B107.1 CL1STB and 19 more. Substitute compatibility should be verified for your specific system.
Is FDS121 still available?
FDS121 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026