PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

5279Socket,socket Wrench

The Stanley Works Dba Stanley Proto · NSN 5120-01-399-9751 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-01-399-9751 — this item is cataloged by the U.S. Government under National Stock Number 5120-01-399-9751. Primary manufacturer part number: 5279.
Features
  • Socket,socket Wrench — FSC 5120
  • Features Provided: MANUAL TOOL
  • Nondefinitive Spec/std Data: 1 TYPE AND 2 CLASS
  • Style Designator: UNIVERSAL JOINT
  • Surface Treatment: CHROMIUM OVERALL
  • Specification/standard Data: 81343-SAE AS954 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
  • Drive Surface Size: 0.375 INCHES NOMINAL SINGLE END IN
  • Wrenching Surface Shape: 12 POINT SINGLE END INTERNAL
Applications
  • Applications requiring Steel Overall construction
General Description

The Socket,socket Wrench, cataloged under National Stock Number 5120-01-399-9751, 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 6 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5120-01-399-9751
Primary Part Number5279
Item NameSocket,socket Wrench
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerThe Stanley Works Dba Stanley Proto
StatusACTIVE
Features ProvidedMANUAL TOOL
Nondefinitive Spec/std Data1 TYPE AND 2 CLASS
Style DesignatorUNIVERSAL JOINT
Surface TreatmentCHROMIUM OVERALL
Specification/standard Data81343-SAE AS954 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
Drive Surface Size0.375 INCHES NOMINAL SINGLE END IN
Wrenching Surface Shape12 POINT SINGLE END INTERNAL
Drive End ShapeSQUARE SINGLE END INTERNAL
MaterialSTEEL OVERALL
Wrenching Surface Size0.750 INCHES NOMINAL SINGLE END IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5935-00-081-14385279 INTERCHANGEABLE
Connector,plug,electrical
Itt Cannon Rf Products
5330-00-146-7440 INTERCHANGEABLE
Gasket
5365-00-342-0262 INTERCHANGEABLE
Ring,externally Threaded
5945-00-476-14015279 INTERCHANGEABLE
Solenoid Assembly
Rocker Solenoid Co Dba Rocker Solenoid Co
5935-00-481-7420 INTERCHANGEABLE
Connector,receptacle,electrical
5905-00-556-3350 INTERCHANGEABLE
Resistor,variable,nonwire Wound,
5935-00-581-25075279 INTERCHANGEABLE
Connector,receptacle,electrical
Hubbell Incorporated (delaware) Dba Wiring Device-Kellems Division
5930-01-022-2057 INTERCHANGEABLE
Switch,thermostatic
4720-01-110-10975279 INTERCHANGEABLE
Hose,nonmetallic
Hoyt Corporation
5935-01-112-54665279 INTERCHANGEABLE
Connector,receptacle,electrical
Bryant Electric
Cross-Reference Index
Part NumberManufacturer
5279 The Stanley Works Dba Stanley Proto (USA)
AS954 TY1CL2 General Services Administration Federal Supply Service (USA)
J5279 The Stanley Works Dba Stanley Proto (USA)
1AL36 W.w. Grainger, Inc. Div Government Sales Division (USA)
AS954 Society of Automotive Engineers Inc (USA)
AS954 Sae International Dba Sae International (USA)
Related Parts
5935-00-081-1438INTERCHANGEABLE
CONNECTOR,PLUG,ELECTRICAL
5279
5330-00-146-7440INTERCHANGEABLE
GASKET
5365-00-342-0262INTERCHANGEABLE
RING,EXTERNALLY THREADED
5945-00-476-1401INTERCHANGEABLE
SOLENOID ASSEMBLY
5279
5935-00-481-7420INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
5905-00-556-3350INTERCHANGEABLE
RESISTOR,VARIABLE,NONWIRE WOUND,
5935-00-581-2507INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
5279
5930-01-022-2057INTERCHANGEABLE
SWITCH,THERMOSTATIC
4720-01-110-1097INTERCHANGEABLE
HOSE,NONMETALLIC
5279
5935-01-112-5466INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
5279
6635-01-259-8281INTERCHANGEABLE
PROVING RING
5-277
6145-01-378-3962INTERCHANGEABLE
CABLE,SPECIAL PURPOSE,ELECTRICAL
25276

Frequently Asked Questions

What is NSN 5120-01-399-9751?

NSN 5120-01-399-9751 is a Socket,socket Wrench, manufactured by The Stanley Works Dba Stanley Proto, classified under FSC 5120 (No Item Name Available). Status: active.

What are the part numbers for NSN 5120-01-399-9751?

NSN 5120-01-399-9751 has 6 cross-referenced part numbers: 5279 (The Stanley Works Dba Stanley Proto), AS954 TY1CL2 (General Services Administration Federal Supply Service), J5279 (The Stanley Works Dba Stanley Proto), 1AL36 (W.w. Grainger, Inc. Div Government Sales Division), AS954 (Society of Automotive Engineers Inc) and 1 more.

What NSN replaces 5120-01-399-9751?

There are 12 known substitutes for 5120-01-399-9751: 5935-00-081-1438, 5330-00-146-7440, 5365-00-342-0262 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 5279?

Key specifications for 5279: Overall Length: 2.234 INCHES NOMINAL IN; Features Provided: MANUAL TOOL; Nondefinitive Spec/std Data: 1 TYPE AND 2 CLASS; Style Designator: UNIVERSAL JOINT. 11 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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