PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

AS955 TY1CL1STASocket,socket Wrench

General Services Administration Federal Supply Service · NSN 5120-01-581-0390 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-01-581-0390 — this item is cataloged by the U.S. Government under National Stock Number 5120-01-581-0390. Primary manufacturer part number: AS955 TY1CL1STA.
Features
  • Socket,socket Wrench — FSC 5120
  • Wrenching Surface Shape: 12 POINT SINGLE END INTERNAL
  • Drive Surface Size: 0.500 INCHES NOMINAL SINGLE END IN
  • Material: STEEL OVERALL
  • Style Designator: INTERNAL-INTERNAL
  • Drive End Shape: SQUARE SINGLE END INTERNAL
  • Surface Treatment: CHROMIUM OVERALL
  • Features Provided: MANUAL TOOL
Applications
  • Applications requiring Steel Overall construction
General Description

The Socket,socket Wrench, cataloged under National Stock Number 5120-01-581-0390, 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 10 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 11 commercial cross-references from 7 manufacturers, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5120-01-581-0390
Primary Part NumberAS955 TY1CL1STA
Item NameSocket,socket Wrench
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerGeneral Services Administration Federal Supply Service
StatusACTIVE
Wrenching Surface Shape12 POINT SINGLE END INTERNAL
Drive Surface Size0.500 INCHES NOMINAL SINGLE END IN
MaterialSTEEL OVERALL
Style DesignatorINTERNAL-INTERNAL
Drive End ShapeSQUARE SINGLE END INTERNAL
Surface TreatmentCHROMIUM OVERALL
Features ProvidedMANUAL TOOL
Wrenching Surface Size18.0 MILLIMETERS NOMINAL SINGLE END MM
Specification/standard Data0U583-SAE AS954 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
Nondefinitive Spec/std Data1 TYPE AND 1 CLASS AND A STYLE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
5330-00-291-2797 INTERCHANGEABLE
Seal,plain Encased
5120-01-147-1715H8075300 INTERCHANGEABLE
Jack Kit,hydraulic,hand
Mcneil Ohio Corp
5365-01-411-255080-753 INTERCHANGEABLE
Spacer,special Shaped
Goodrich Corporation Div Collins Aerospace, Landing Systems (wheels & Brakes)
4140-01-450-9791 INTERCHANGEABLE
Fan
5330-01-509-119539118 INTERCHANGEABLE
Seal,plain
Hydraulics International, Inc. Dba Hydraulics International Inc
5306-01-556-681339118 INTERCHANGEABLE
Bolt,machine
Fastenal Company Dba Fastenal Co
2540-01-668-270280753 INTERCHANGEABLE
Coupler,drawbar,ball Socket
Champion Road Machinery Inc
Cross-Reference Index
Part NumberManufacturer
AS955 TY1CL1STA General Services Administration Federal Supply Service (USA)
AS955 Sae International Dba Sae International (USA)
39-118 Armstrong Bros Tool Co (USA)
456720019302 Ncb Hungary (honvedsegi Egyseges Termekkod) (HUN)
AS955 Society of Automotive Engineers Inc (USA)
39-118 Easco Hand Tools Inc Dba Danaher Tool Group Div Danaher Tool Group Easco Hand Tools Inc. (USA)
AS954 Sae International Dba Sae International (USA)
AS954 TY1CL1STA General Services Administration Federal Supply Service (USA)
39-118 Apex Tool Group, Llc Dba Nicholson (USA)
39-118D Apex Tool Group, Llc Dba Nicholson (USA)
80753 Apex Tool Group, Llc Dba Nicholson (USA)
Related Parts
5330-00-291-2797INTERCHANGEABLE
SEAL,PLAIN ENCASED
5120-01-147-1715INTERCHANGEABLE
JACK KIT,HYDRAULIC,HAND
H8075300
5365-01-411-2550INTERCHANGEABLE
SPACER,SPECIAL SHAPED
80-753
4140-01-450-9791INTERCHANGEABLE
FAN
5330-01-509-1195INTERCHANGEABLE
SEAL,PLAIN
39118
5306-01-556-6813INTERCHANGEABLE
BOLT,MACHINE
39118
2540-01-668-2702INTERCHANGEABLE
COUPLER,DRAWBAR,BALL SOCKET
80753

Frequently Asked Questions

What is NSN 5120-01-581-0390?

NSN 5120-01-581-0390 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 5120-01-581-0390?

NSN 5120-01-581-0390 has 11 cross-referenced part numbers: AS955 TY1CL1STA (General Services Administration Federal Supply Service), AS955 (Sae International Dba Sae International), 39-118 (Armstrong Bros Tool Co), 456720019302 (Ncb Hungary (honvedsegi Egyseges Termekkod)), AS955 (Society of Automotive Engineers Inc) and 6 more.

What NSN replaces 5120-01-581-0390?

There are 7 known substitutes for 5120-01-581-0390: 5330-00-291-2797, 5120-01-147-1715, 5365-01-411-2550 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of AS955 TY1CL1STA?

Key specifications for AS955 TY1CL1STA: Wrenching Surface Shape: 12 POINT SINGLE END INTERNAL; Drive Surface Size: 0.500 INCHES NOMINAL SINGLE END IN; Material: STEEL OVERALL; Style Designator: INTERNAL-INTERNAL. 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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