PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

40426Socket,socket Wrench

S K Hand Tool Corp · NSN 5120-00-678-2431 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-00-678-2431 — this item is cataloged by the U.S. Government under National Stock Number 5120-00-678-2431. Primary manufacturer part number: 40426.
Features
  • Socket,socket Wrench — FSC 5120
  • Wrenching End Outside Diameter: 1.080 INCHES MAXIMUM IN
  • Drive End Outside Diameter: 1.080 INCHES MAXIMUM IN
  • Surface Treatment: CHROMIUM OVERALL
  • Style Designator: INTERNAL-INTERNAL
  • Wrenching End Opening Depth: 0.218 INCHES MINIMUM IN
  • Drive Surface Size: 0.375 INCHES NOMINAL SINGLE END IN
  • Nondefinitive Spec/std Data: 2 TYPE AND 5 CLASS
Applications
  • Applications requiring Steel Overall construction
General Description

The Socket,socket Wrench, cataloged under National Stock Number 5120-00-678-2431, is classified within Federal Supply Class 5120 (No Item Name Available) of the Hand Tools group. The primary manufacturer of record is S K Hand Tool Corp. Government technical data includes 13 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5120-00-678-2431
Primary Part Number40426
Item NameSocket,socket Wrench
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerS K Hand Tool Corp
StatusACTIVE
Wrenching End Outside Diameter1.080 INCHES MAXIMUM IN
Drive End Outside Diameter1.080 INCHES MAXIMUM IN
Surface TreatmentCHROMIUM OVERALL
Style DesignatorINTERNAL-INTERNAL
Wrenching End Opening Depth0.218 INCHES MINIMUM IN
Drive Surface Size0.375 INCHES NOMINAL SINGLE END IN
Nondefinitive Spec/std Data2 TYPE AND 5 CLASS
Features ProvidedMANUAL TOOL
Wrenching Surface Shape6 POINT FIRST END INTERNAL
Wrenching Surface Size0.812 INCHES NOMINAL SINGLE END IN
Drive End ShapeSQUARE SINGLE END INTERNAL
Special Markings13/16 IN. IN
MaterialSTEEL OVERALL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
5120-00-221-8001 INTERCHANGEABLE
Socket,socket Wrench
3455-00-240-731312710 INTERCHANGEABLE
Cutter,milling,angle
Niagara Cutter Inc
5930-00-564-377240426 INTERCHANGEABLE
Switch,box
General Electric Co Electrical Distribution and Control
5120-00-678-2432101258-13 INTERCHANGEABLE
Socket,socket Wrench
Cadillac Gage Textron Inc.
6610-00-739-846040426 INTERCHANGEABLE
Spheroid Assembly
Undersea Sensor Systems Inc Div Ultra Sonobuoy Systems
5962-01-078-574340426 INTERCHANGEABLE
Microcircuit
Raytheon Company Div Rmd Strategic
5307-01-196-27014042-6 INTERCHANGEABLE
Stud,self-Locking
Portland Valve Llc
6515-01-451-1360404-26 INTERCHANGEABLE
Screw,bone
Depuy Synthes Sales Inc Dba Depuy Synthes Trauma Div Depuy Synthes Sales, Inc., D/b/a Depuy Synthes Trauma
Cross-Reference Index
Part NumberManufacturer
40426 S K Hand Tool Corp (USA)
5026HP Stanley-Proto Industrial Works Div of the Stanley Works (USA)
GGG-W-641 TY2CL5 General Services Administration Federal Supply Service (USA)
1326HP Ingersoll-Rand Co Proto Tool Div Schiller Park Plant (USA)
GGG-W-641 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
Related Parts
5120-00-221-8001INTERCHANGEABLE
SOCKET,SOCKET WRENCH
3455-00-240-7313INTERCHANGEABLE
CUTTER,MILLING,ANGLE
12710
5930-00-564-3772INTERCHANGEABLE
SWITCH,BOX
40426
5120-00-678-2432INTERCHANGEABLE
SOCKET,SOCKET WRENCH
101258-13
6610-00-739-8460INTERCHANGEABLE
SPHEROID ASSEMBLY
40426
5962-01-078-5743INTERCHANGEABLE
MICROCIRCUIT
40426
5307-01-196-2701INTERCHANGEABLE
STUD,SELF-LOCKING
4042-6
6515-01-451-1360INTERCHANGEABLE
SCREW,BONE
404-26

Frequently Asked Questions

What is NSN 5120-00-678-2431?

NSN 5120-00-678-2431 is a Socket,socket Wrench, manufactured by S K Hand Tool Corp, classified under FSC 5120 (No Item Name Available). Status: active.

What are the part numbers for NSN 5120-00-678-2431?

NSN 5120-00-678-2431 has 5 cross-referenced part numbers: 40426 (S K Hand Tool Corp), 5026HP (Stanley-Proto Industrial Works Div of the Stanley Works), GGG-W-641 TY2CL5 (General Services Administration Federal Supply Service), 1326HP (Ingersoll-Rand Co Proto Tool Div Schiller Park Plant), GGG-W-641 (Federal Specifications Promulgated by General Services Administration Washington DC).

What NSN replaces 5120-00-678-2431?

There are 8 known substitutes for 5120-00-678-2431: 5120-00-221-8001, 3455-00-240-7313, 5930-00-564-3772 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 40426?

Key specifications for 40426: Wrenching End Outside Diameter: 1.080 INCHES MAXIMUM IN; Overall Length: 2.250 INCHES MINIMUM IN; Drive End Outside Diameter: 1.080 INCHES MAXIMUM IN; Surface Treatment: CHROMIUM OVERALL. 14 total characteristics are documented in the Federal Logistics Information System.

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