PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

FDS121Socket,socket Wrench

Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc · NSN 5120-00-277-1463 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-00-277-1463 — this item is cataloged by the U.S. Government under National Stock Number 5120-00-277-1463. Primary manufacturer part number: FDS121.
Features
  • Socket,socket Wrench — FSC 5120
  • 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
Applications
  • Applications requiring Steel Overall construction
General Description

The Socket,socket Wrench, cataloged under National Stock Number 5120-00-277-1463, is classified within Federal Supply Class 5120 (No Item Name Available) of the Hand Tools group. The primary manufacturer of record is Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc. Government technical data includes 11 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 16 commercial cross-references from 13 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5120-00-277-1463
Primary Part NumberFDS121
Item NameSocket,socket Wrench
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerIdsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc
StatusCANCELLED
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
Special Markings3/8 IN. IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5920-00-221-569342412 INTERCHANGEABLE
Fuseholder,block
Lockheed Martin Corporation Div Rms
5120-00-235-5809 INTERCHANGEABLE
Socket,socket Wrench
5120-00-235-5879 INTERCHANGEABLE
Socket,socket Wrench
5120-00-239-0017 INTERCHANGEABLE
Socket,socket Wrench
5120-00-239-0018 INTERCHANGEABLE
Socket,socket Wrench
5120-00-241-3185 INTERCHANGEABLE
Socket,socket Wrench
5120-00-277-1464 INTERCHANGEABLE
Socket,socket Wrench
5120-00-277-4252 INTERCHANGEABLE
Socket,socket Wrench
7510-00-550-71251212-YL05 INTERCHANGEABLE
Tape,pressure Sensitive Adhesive
Valley Industrial Products Inc
7510-00-550-71271244-05 INTERCHANGEABLE
Tape,pressure Sensitive Adhesive
Valley Industrial Products Inc
Cross-Reference Index
Part NumberManufacturer
AS954 Society of Automotive Engineers Inc (USA)
AS954 TY1CL1STB General Services Administration Federal Supply Service (USA)
FDS121 PRIMARY Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc (USA)
GGG-W-641 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
FDS121 Ge Avio Srl (ITA)
FDS121 Fincantieri S.p.a. Div Direzione Navi Militari (ITA)
B107.1 The American Society of Mechanical Engineers (USA)
A-A-1403 Federal Commercial Item Description Promulgated by General Services Administration Washington DC (USA)
AS954 Sae International Dba Sae International (USA)
5120PL0845255 Jednolity Indeks Materialowy - Uniform Material Index (POL)
B107.1 TY1CL2 General Services Administration Federal Supply Service (USA)
B107.1 CL1STB General Services Administration Federal Supply Service (USA)
87501016-101 Woodward Hrt Inc (USA)
J-35167 Bosch Automotive Service Solutions Inc. (USA)
FVS121 Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc (USA)
42412 S K Hand Tool Corp (USA)
Related Parts
5920-00-221-5693INTERCHANGEABLE
FUSEHOLDER,BLOCK
42412
5120-00-235-5809INTERCHANGEABLE
SOCKET,SOCKET WRENCH
5120-00-235-5879INTERCHANGEABLE
SOCKET,SOCKET WRENCH
5120-00-239-0017INTERCHANGEABLE
SOCKET,SOCKET WRENCH
5120-00-239-0018INTERCHANGEABLE
SOCKET,SOCKET WRENCH
5120-00-241-3185INTERCHANGEABLE
SOCKET,SOCKET WRENCH
5120-00-277-1464INTERCHANGEABLE
SOCKET,SOCKET WRENCH
5120-00-277-4252INTERCHANGEABLE
SOCKET,SOCKET WRENCH
7510-00-550-7125INTERCHANGEABLE
TAPE,PRESSURE SENSITIVE ADHESIVE
1212-YL05
7510-00-550-7127INTERCHANGEABLE
TAPE,PRESSURE SENSITIVE ADHESIVE
1244-05
4820-00-554-8713INTERCHANGEABLE
VALVE,GATE
MSS SP-80-1A-1/2
5120-00-596-0836INTERCHANGEABLE
SOCKET,SOCKET WRENCH

Frequently Asked Questions

What is NSN 5120-00-277-1463?

NSN 5120-00-277-1463 is a Socket,socket Wrench, manufactured by Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc, classified under FSC 5120 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5120-00-277-1463?

NSN 5120-00-277-1463 has 16 cross-referenced part numbers: AS954 (Society of Automotive Engineers Inc), AS954 TY1CL1STB (General Services Administration Federal Supply Service), FDS121 (Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc), GGG-W-641 (Federal Specifications Promulgated by General Services Administration Washington DC), FDS121 (Ge Avio Srl) and 11 more.

What NSN replaces 5120-00-277-1463?

There are 12 known substitutes for 5120-00-277-1463: 5920-00-221-5693, 5120-00-235-5809, 5120-00-235-5879 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of FDS121?

Key specifications for FDS121: 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. 12 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5120-00-277-1463 still in active supply?

NSN 5120-00-277-1463 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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