PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

5440Socket,socket Wrench

The Stanley Works Dba Stanley Proto · NSN 5120-01-428-4778 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-01-428-4778 — this item is cataloged by the U.S. Government under National Stock Number 5120-01-428-4778. Primary manufacturer part number: 5440.
Features
  • Socket,socket Wrench — FSC 5120
  • Wrenching Surface Size: 1.250 INCHES NOMINAL SINGLE END IN
  • Nondefinitive Spec/std Data: 1 TYPE AND 1 CLASS AND A STYLE
  • Drive Surface Size: 0.500 INCHES NOMINAL SINGLE END IN
  • Wrenching Surface Shape: 12 POINT SINGLE END INTERNAL
  • Features Provided: MANUAL TOOL
  • Drive End Shape: SQUARE SINGLE END INTERNAL
  • Specification/standard Data: 81343-SAE AS954 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
Applications
  • Applications requiring Steel Overall construction
General Description

The Socket,socket Wrench, cataloged under National Stock Number 5120-01-428-4778, 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 12 commercial cross-references from 10 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
NSN5120-01-428-4778
Primary Part Number5440
Item NameSocket,socket Wrench
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerThe Stanley Works Dba Stanley Proto
StatusCANCELLED
Wrenching Surface Size1.250 INCHES NOMINAL SINGLE END IN
Nondefinitive Spec/std Data1 TYPE AND 1 CLASS AND A STYLE
Drive Surface Size0.500 INCHES NOMINAL SINGLE END IN
Wrenching Surface Shape12 POINT SINGLE END INTERNAL
Features ProvidedMANUAL TOOL
Drive End ShapeSQUARE SINGLE END INTERNAL
Specification/standard Data81343-SAE AS954 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
Style DesignatorINTERNAL-INTERNAL
Surface TreatmentCHROMIUM OVERALL
MaterialSTEEL OVERALL
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5999-00-035-787840-140 INTERCHANGEABLE
Contact,electrical
Eaton Corp Opns & Technical Center
3110-00-100-0801 INTERCHANGEABLE
Cup,tapered Roller Bearing
5340-00-129-946010359-SS-1032-7 INTERCHANGEABLE
Handle,bow
Carey Manufacturing Co, Inc Dba Amatom Electronic Hardware Div Amatom Electronic Hardware
5960-00-158-4841B5441A INTERCHANGEABLE
Electron Tube
Unisys Corporation Dba Unisys Corp
3455-00-224-364010190 INTERCHANGEABLE
Cutter,milling,plain
Niagara Cutter Inc
5315-00-234-1664MS24665-495 INTERCHANGEABLE
Pin,cotter
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5935-00-442-19475M1099-001 INTERCHANGEABLE
Connector,receptacle,electrical
The Boeing Company Div Defense
4320-00-558-0167 INTERCHANGEABLE
Spring Assembly,compensator
5330-00-594-6321 INTERCHANGEABLE
Seal,plain Encased
7025-00-617-0255703502 INTERCHANGEABLE
Magnetic Disk,data
Xidex Corp
Cross-Reference Index
Part NumberManufacturer
5440 The Stanley Works Dba Stanley Proto (USA)
AS954 Society of Automotive Engineers Inc (USA)
AS954 Sae International Dba Sae International (USA)
40140 S K Hand Tool Corp (USA)
AS954 TY1CL1STA General Services Administration Federal Supply Service (USA)
STP 5440G Kipper Tool Company Dba Kipper Management Inc (USA)
J5440 Henchman Group Pty Ltd the Trustee for Henchman Unit Trust (AUS)
B107.1 TY1CL1 General Services Administration Federal Supply Service (USA)
B107.1 The American Society of Mechanical Engineers (USA)
1AM81 W.w. Grainger, Inc. Div Government Sales Division (USA)
J5440 The Stanley Works Dba Stanley Proto (USA)
J5440 Henchman Products Pty Ltd (AUS)
Related Parts
5999-00-035-7878INTERCHANGEABLE
CONTACT,ELECTRICAL
40-140
3110-00-100-0801INTERCHANGEABLE
CUP,TAPERED ROLLER BEARING
5340-00-129-9460INTERCHANGEABLE
HANDLE,BOW
10359-SS-1032-7
5960-00-158-4841INTERCHANGEABLE
ELECTRON TUBE
B5441A
3455-00-224-3640INTERCHANGEABLE
CUTTER,MILLING,PLAIN
10190
5315-00-234-1664INTERCHANGEABLE
PIN,COTTER
MS24665-495
5935-00-442-1947INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
5M1099-001
4320-00-558-0167INTERCHANGEABLE
SPRING ASSEMBLY,COMPENSATOR
5330-00-594-6321INTERCHANGEABLE
SEAL,PLAIN ENCASED
7025-00-617-0255INTERCHANGEABLE
MAGNETIC DISK,DATA
703502
6240-00-752-2424INTERCHANGEABLE
LAMP,INCANDESCENT
2520-00-848-0530INTERCHANGEABLE
SUPPORT

Frequently Asked Questions

What is NSN 5120-01-428-4778?

NSN 5120-01-428-4778 is a Socket,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 5120-01-428-4778?

NSN 5120-01-428-4778 has 12 cross-referenced part numbers: 5440 (The Stanley Works Dba Stanley Proto), AS954 (Society of Automotive Engineers Inc), AS954 (Sae International Dba Sae International), 40140 (S K Hand Tool Corp), AS954 TY1CL1STA (General Services Administration Federal Supply Service) and 7 more.

What NSN replaces 5120-01-428-4778?

There are 12 known substitutes for 5120-01-428-4778: 5999-00-035-7878, 3110-00-100-0801, 5340-00-129-9460 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 5440?

Key specifications for 5440: Overall Length: 1.750 INCHES NOMINAL IN; Wrenching Surface Size: 1.250 INCHES NOMINAL SINGLE END IN; Nondefinitive Spec/std Data: 1 TYPE AND 1 CLASS AND A STYLE; Drive Surface Size: 0.500 INCHES NOMINAL SINGLE END IN. 12 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5120-01-428-4778 still in active supply?

NSN 5120-01-428-4778 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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