PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

SW121ASocket,socket Wrench

Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc · NSN 5120-00-237-0982 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-00-237-0982 — this item is cataloged by the U.S. Government under National Stock Number 5120-00-237-0982. Primary manufacturer part number: SW121A.
Features
  • Socket,socket Wrench — FSC 5120
  • Specification/standard Data: 0U583-SAE AS954 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
  • Material: STEEL OVERALL
  • Special Markings: 3/8 IN. IN
  • Features Provided: MANUAL TOOL
  • Drive End Shape: SQUARE SINGLE END INTERNAL
  • Style Designator: INTERNAL-INTERNAL
  • Drive Surface Size: 0.500 INCHES NOMINAL SINGLE END IN
Applications
  • Applications requiring Steel Overall construction
General Description

The Socket,socket Wrench, cataloged under National Stock Number 5120-00-237-0982, 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 12 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 15 commercial cross-references from 11 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
NSN5120-00-237-0982
Primary Part NumberSW121A
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
Specification/standard Data0U583-SAE AS954 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
MaterialSTEEL OVERALL
Special Markings3/8 IN. IN
Features ProvidedMANUAL TOOL
Drive End ShapeSQUARE SINGLE END INTERNAL
Style DesignatorINTERNAL-INTERNAL
Drive Surface Size0.500 INCHES NOMINAL SINGLE END IN
Wrenching Surface Shape12 POINT SINGLE END INTERNAL
Environmental Attribute CodePLASTICS REMOVAL IN THE MARINE ENVIRONMENT (PRIME) PRODUCT
Wrenching Surface Size0.375 INCHES NOMINAL SINGLE END IN
Surface TreatmentCHROMIUM OVERALL
Nondefinitive Spec/std Data1 TYPE AND 1 CLASS AND A STYLE
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5120-00-189-7913 INTERCHANGEABLE
Socket,socket Wrench
5120-00-189-7914 INTERCHANGEABLE
Socket,socket Wrench
5120-00-189-7917 INTERCHANGEABLE
Socket,socket Wrench
5120-00-189-7924 INTERCHANGEABLE
Socket,socket Wrench
5120-00-189-7927 INTERCHANGEABLE
Socket,socket Wrench
5120-00-189-7932 INTERCHANGEABLE
Socket,socket Wrench
5120-00-189-7933 INTERCHANGEABLE
Socket,socket Wrench
5120-00-189-7934 INTERCHANGEABLE
Socket,socket Wrench
5120-00-189-7935 INTERCHANGEABLE
Socket,socket Wrench
5120-00-189-7946 INTERCHANGEABLE
Socket,socket Wrench
Cross-Reference Index
Part NumberManufacturer
B107.1 The American Society of Mechanical Engineers (USA)
512 Thorsen Tool Co Sub of Wallace-Murray Corp (USA)
5120PL1074090 Jednolity Indeks Materialowy - Uniform Material Index (POL)
AS954 Society of Automotive Engineers Inc (USA)
B107.1 TY1CL1 General Services Administration Federal Supply Service (USA)
AS954 Sae International Dba Sae International (USA)
5120002370982 Etablissement Central De Gestion Etde Stockage Du Materiel
SW121A PRIMARY Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc (USA)
B107.1 CL1STA General Services Administration Federal Supply Service (USA)
GGG-W-641 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
SW121 Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc (USA)
AS954 TY1CL1STA General Services Administration Federal Supply Service (USA)
10086317 Nimikkeistokeskus Ncb Finland (FIN)
A-A-1399 Federal Commercial Item Description Promulgated by General Services Administration Washington DC (USA)
GGG-W-641 TY2CL2STA General Services Administration Federal Supply Service (USA)
Related Parts
5120-00-189-7913INTERCHANGEABLE
SOCKET,SOCKET WRENCH
5120-00-189-7914INTERCHANGEABLE
SOCKET,SOCKET WRENCH
5120-00-189-7917INTERCHANGEABLE
SOCKET,SOCKET WRENCH
5120-00-189-7924INTERCHANGEABLE
SOCKET,SOCKET WRENCH
5120-00-189-7927INTERCHANGEABLE
SOCKET,SOCKET WRENCH
5120-00-189-7932INTERCHANGEABLE
SOCKET,SOCKET WRENCH
5120-00-189-7933INTERCHANGEABLE
SOCKET,SOCKET WRENCH
5120-00-189-7934INTERCHANGEABLE
SOCKET,SOCKET WRENCH
5120-00-189-7935INTERCHANGEABLE
SOCKET,SOCKET WRENCH
5120-00-189-7946INTERCHANGEABLE
SOCKET,SOCKET WRENCH
5120-00-189-7985INTERCHANGEABLE
SOCKET,SOCKET WRENCH
5120-00-235-5870INTERCHANGEABLE
SOCKET,SOCKET WRENCH

Frequently Asked Questions

What is NSN 5120-00-237-0982?

NSN 5120-00-237-0982 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 5120-00-237-0982?

NSN 5120-00-237-0982 has 15 cross-referenced part numbers: B107.1 (The American Society of Mechanical Engineers), 512 (Thorsen Tool Co Sub of Wallace-Murray Corp), 5120PL1074090 (Jednolity Indeks Materialowy - Uniform Material Index), AS954 (Society of Automotive Engineers Inc), B107.1 TY1CL1 (General Services Administration Federal Supply Service) and 10 more.

What NSN replaces 5120-00-237-0982?

There are 12 known substitutes for 5120-00-237-0982: 5120-00-189-7913, 5120-00-189-7914, 5120-00-189-7917 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of SW121A?

Key specifications for SW121A: Specification/standard Data: 0U583-SAE AS954 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD; Material: STEEL OVERALL; Special Markings: 3/8 IN. IN; Features Provided: MANUAL TOOL. 13 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5120-00-237-0982 still in active supply?

NSN 5120-00-237-0982 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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