PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

AS954 TY1CL1STASocket,socket Wrench

General Services Administration Federal Supply Service · NSN 5120-01-278-8251 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-01-278-8251 — this item is cataloged by the U.S. Government under National Stock Number 5120-01-278-8251. Primary manufacturer part number: AS954 TY1CL1STA.
Features
  • Socket,socket Wrench — FSC 5120
  • Surface Treatment: CHROMIUM OVERALL
  • Wrenching Surface Shape: 12 POINT SINGLE END INTERNAL
  • Wrenching Surface Size: 1.312 INCHES NOMINAL SINGLE END IN
  • Drive End Shape: SQUARE SINGLE END INTERNAL
  • Style Designator: INTERNAL-INTERNAL
  • Material: STEEL OVERALL
  • Nondefinitive Spec/std Data: 1 TYPE AND 1 CLASS AND A STYLE
Applications
  • Applications requiring Steel Overall construction
General Description

The Socket,socket Wrench, cataloged under National Stock Number 5120-01-278-8251, is classified within Federal Supply Class 5120 (No Item Name Available) of the Hand Tools group. The primary manufacturer of record is General Services Administration Federal Supply Service. Government technical data includes 13 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5120-01-278-8251
Primary Part NumberAS954 TY1CL1STA
Item NameSocket,socket Wrench
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerGeneral Services Administration Federal Supply Service
StatusACTIVE
Surface TreatmentCHROMIUM OVERALL
Wrenching Surface Shape12 POINT SINGLE END INTERNAL
Wrenching Surface Size1.312 INCHES NOMINAL SINGLE END IN
Drive End ShapeSQUARE SINGLE END INTERNAL
Style DesignatorINTERNAL-INTERNAL
MaterialSTEEL OVERALL
Nondefinitive Spec/std Data1 TYPE AND 1 CLASS AND A STYLE
Specification/standard Data81343-SAE AS954 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
Wrenching End Opening Depth0.840 INCHES MINIMUM IN
Drive End Outside Diameter1.920 INCHES MAXIMUM IN
Wrenching End Outside Diameter1.920 INCHES MAXIMUM IN
Drive Surface Size0.750 INCHES NOMINAL SINGLE END IN
Features ProvidedMANUAL TOOL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
3455-00-250-0770 INTERCHANGEABLE
Cutter,milling,end
5950-01-036-5202R42 INTERCHANGEABLE
Transformer,power
Magnetika Inc Div Magnetika/phillipsburg Location
4110-01-119-3959 INTERCHANGEABLE
Refrigerator-Freezer,mechanical,
5975-01-205-3443R-42 INTERCHANGEABLE
Adapter,electrical Conduit
Killark Electric Mfg Co
Cross-Reference Index
Part NumberManufacturer
AS954 TY1CL1STA General Services Administration Federal Supply Service (USA)
R-42 Utica Tool Co Inc (USA)
36242-01 Utica Tool Co Inc (USA)
AS954 Sae International Dba Sae International (USA)
AS954 Society of Automotive Engineers Inc (USA)
Related Parts
3455-00-250-0770INTERCHANGEABLE
CUTTER,MILLING,END
5950-01-036-5202INTERCHANGEABLE
TRANSFORMER,POWER
R42
4110-01-119-3959INTERCHANGEABLE
REFRIGERATOR-FREEZER,MECHANICAL,
5975-01-205-3443INTERCHANGEABLE
ADAPTER,ELECTRICAL CONDUIT
R-42

Frequently Asked Questions

What is NSN 5120-01-278-8251?

NSN 5120-01-278-8251 is a Socket,socket Wrench, manufactured by General Services Administration Federal Supply Service, classified under FSC 5120 (No Item Name Available). Status: active.

What are the part numbers for NSN 5120-01-278-8251?

NSN 5120-01-278-8251 has 5 cross-referenced part numbers: AS954 TY1CL1STA (General Services Administration Federal Supply Service), R-42 (Utica Tool Co Inc), 36242-01 (Utica Tool Co Inc), AS954 (Sae International Dba Sae International), AS954 (Society of Automotive Engineers Inc).

What NSN replaces 5120-01-278-8251?

There are 4 known substitutes for 5120-01-278-8251: 3455-00-250-0770, 5950-01-036-5202, 4110-01-119-3959 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of AS954 TY1CL1STA?

Key specifications for AS954 TY1CL1STA: Overall Length: 2.700 INCHES MAXIMUM IN; Surface Treatment: CHROMIUM OVERALL; Wrenching Surface Shape: 12 POINT SINGLE END INTERNAL; Wrenching Surface Size: 1.312 INCHES NOMINAL SINGLE END IN. 15 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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