PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

5263Extension,socket Wrench

The Stanley Works Dba Stanley Proto · NSN 5120-00-273-9205 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-00-273-9205 — this item is cataloged by the U.S. Government under National Stock Number 5120-00-273-9205. Primary manufacturer part number: 5263.
Features
  • Extension,socket Wrench — FSC 5120
  • Specification/standard Data: 0U583-SAE AS4283 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
  • Features Provided: MANUAL TOOL
  • Surface Treatment: CHROMIUM OVERALL
  • Drive Surface Size: 0.375 INCHES NOMINAL BOTH ENDS IN
  • Style Designator: RIGID
  • Drive End Shape: SQUARE FIRST END INTERNAL
  • Drive End Shape: SQUARE SECOND END EXTERNAL
Applications
  • Applications requiring Steel Overall construction
General Description

The Extension,socket Wrench, cataloged under National Stock Number 5120-00-273-9205, is classified within Federal Supply Class 5120 (No Item Name Available) of the Hand Tools group. The primary manufacturer of record is The Stanley Works Dba Stanley Proto. Government technical data includes 10 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 20 commercial cross-references from 14 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
NSN5120-00-273-9205
Primary Part Number5263
Item NameExtension,socket Wrench
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerThe Stanley Works Dba Stanley Proto
StatusCANCELLED
Specification/standard Data0U583-SAE AS4283 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
Features ProvidedMANUAL TOOL
Surface TreatmentCHROMIUM OVERALL
Drive Surface Size0.375 INCHES NOMINAL BOTH ENDS IN
Style DesignatorRIGID
Drive End ShapeSQUARE FIRST END INTERNAL
Drive End ShapeSQUARE SECOND END EXTERNAL
MaterialSTEEL OVERALL
Nondefinitive Spec/std Data2 TYPE AND 2 CLASS
Outside Diameter0.500 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5120-00-227-8074JHWS-115P INTERCHANGEABLE
Extension,socket Wrench
Williams J H Industrial Products Inc
5120-00-227-8079 INTERCHANGEABLE
Extension,socket Wrench
5120-00-227-8105 INTERCHANGEABLE
Extension,socket Wrench
5120-00-227-8107 INTERCHANGEABLE
Extension,socket Wrench
5120-00-240-8704 INTERCHANGEABLE
Extension,socket Wrench
5120-00-240-8705 INTERCHANGEABLE
Extension,socket Wrench
5120-00-240-8706 INTERCHANGEABLE
Extension,socket Wrench
5120-00-243-1689 INTERCHANGEABLE
Extension,socket Wrench
5120-00-243-1691 INTERCHANGEABLE
Extension,socket Wrench
5120-00-243-1693 INTERCHANGEABLE
Extension,socket Wrench
Cross-Reference Index
Part NumberManufacturer
5263 The Stanley Works Dba Stanley Proto (USA)
1AH78 W.w. Grainger, Inc. Div Government Sales Division (USA)
45163 S K Hand Tool Corp (USA)
B107.10M TY2CL2ST1 General Services Administration Federal Supply Service (USA)
10607869 Us Army Aviation and Missile Command (USA)
J5263 Henchman Group Pty Ltd the Trustee for Henchman Unit Trust (AUS)
J5263 Henchman Products Pty Ltd (AUS)
FX20 Sna Germany Gmbh (DEU)
AS4283 Society of Automotive Engineers Inc (USA)
J5263 The Stanley Works Dba Stanley Proto (USA)
GGG-W-641 TY4CL4STA General Services Administration Federal Supply Service (USA)
B107.10M The American Society of Mechanical Engineers (USA)
FX20 Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc (USA)
AS4283 TY2CL2 General Services Administration Federal Supply Service (USA)
A-A-2170 Federal Commercial Item Description Promulgated by General Services Administration Washington DC (USA)
FX18 Sna Germany Gmbh (DEU)
B107.10 The American Society of Mechanical Engineers (USA)
B107.10 TY2CL2STA General Services Administration Federal Supply Service (USA)
AS4283 Sae International Dba Sae International (USA)
GGG-W-641 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
Related Parts
5120-00-227-8074INTERCHANGEABLE
EXTENSION,SOCKET WRENCH
JHWS-115P
5120-00-227-8079INTERCHANGEABLE
EXTENSION,SOCKET WRENCH
5120-00-227-8105INTERCHANGEABLE
EXTENSION,SOCKET WRENCH
5120-00-227-8107INTERCHANGEABLE
EXTENSION,SOCKET WRENCH
5120-00-240-8704INTERCHANGEABLE
EXTENSION,SOCKET WRENCH
5120-00-240-8705INTERCHANGEABLE
EXTENSION,SOCKET WRENCH
5120-00-240-8706INTERCHANGEABLE
EXTENSION,SOCKET WRENCH
5120-00-243-1689INTERCHANGEABLE
EXTENSION,SOCKET WRENCH
5120-00-243-1691INTERCHANGEABLE
EXTENSION,SOCKET WRENCH
5120-00-243-1693INTERCHANGEABLE
EXTENSION,SOCKET WRENCH
5120-00-243-1697INTERCHANGEABLE
EXTENSION,SOCKET WRENCH
5120-00-243-7325INTERCHANGEABLE
EXTENSION,SOCKET WRENCH

Frequently Asked Questions

What is NSN 5120-00-273-9205?

NSN 5120-00-273-9205 is a Extension,socket Wrench, manufactured by The Stanley Works Dba Stanley Proto, classified under FSC 5120 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5120-00-273-9205?

NSN 5120-00-273-9205 has 20 cross-referenced part numbers: 5263 (The Stanley Works Dba Stanley Proto), 1AH78 (W.w. Grainger, Inc. Div Government Sales Division), 45163 (S K Hand Tool Corp), B107.10M TY2CL2ST1 (General Services Administration Federal Supply Service), 10607869 (Us Army Aviation and Missile Command) and 15 more.

What NSN replaces 5120-00-273-9205?

There are 12 known substitutes for 5120-00-273-9205: 5120-00-227-8074, 5120-00-227-8079, 5120-00-227-8105 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 5263?

Key specifications for 5263: Specification/standard Data: 0U583-SAE AS4283 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD; Features Provided: MANUAL TOOL; Surface Treatment: CHROMIUM OVERALL; Drive Surface Size: 0.375 INCHES NOMINAL BOTH ENDS IN. 11 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5120-00-273-9205 still in active supply?

NSN 5120-00-273-9205 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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