PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

81241Extension,socket Wrench

Apex Tool Group, Llc Dba Nicholson · NSN 5120-01-647-3135 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-01-647-3135 — this item is cataloged by the U.S. Government under National Stock Number 5120-01-647-3135. Primary manufacturer part number: 81241.
Features
  • Extension,socket Wrench — FSC 5120
  • Specification/standard Data: 0U583-SAE AS4283 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
  • Nondefinitive Spec/std Data: 2 TYPE AND 2 CLASS
  • Style Designator: RIGID
  • 6 verified cross-references
  • Primary manufacturer: Apex Tool Group, Llc Dba Nicholson
Applications
  • Field maintenance and repair
  • Facility maintenance operations
  • General-purpose hand tools
General Description

The Extension,socket Wrench, cataloged under National Stock Number 5120-01-647-3135, is classified within Federal Supply Class 5120 (No Item Name Available) of the Hand Tools group. The primary manufacturer of record is Apex Tool Group, Llc Dba Nicholson. Government technical data includes 3 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. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5120-01-647-3135
Primary Part Number81241
Item NameExtension,socket Wrench
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerApex Tool Group, Llc Dba Nicholson
StatusACTIVE
Specification/standard Data0U583-SAE AS4283 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
Nondefinitive Spec/std Data2 TYPE AND 2 CLASS
Style DesignatorRIGID
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
4720-01-015-426920923 INTERCHANGEABLE
Hose,preformed
Gates Corporation
5340-01-515-3764 INTERCHANGEABLE
Pad,cushioning
6220-01-582-504481100 INTERCHANGEABLE
Spotlight
Truck-Lite Co., Llc
5305-01-586-852511922A INTERCHANGEABLE
Screw,cap,hexagon Head
Indiana Mills & Manufacturing Inc Dba Indiana Mills & Manufacturing Inc
Cross-Reference Index
Part NumberManufacturer
81241 Apex Tool Group, Llc Dba Nicholson (USA)
AS4283 TY2CL2 General Services Administration Federal Supply Service (USA)
11-922A Armstrong Bros Tool Co (USA)
AS4283 Sae International Dba Sae International (USA)
11-922A Apex Tool Group, Llc Dba Nicholson (USA)
AS4283 Society of Automotive Engineers Inc (USA)
Related Parts
4720-01-015-4269INTERCHANGEABLE
HOSE,PREFORMED
20923
5340-01-515-3764INTERCHANGEABLE
PAD,CUSHIONING
6220-01-582-5044INTERCHANGEABLE
SPOTLIGHT
81100
5305-01-586-8525INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
11922A

Frequently Asked Questions

What is NSN 5120-01-647-3135?

NSN 5120-01-647-3135 is a Extension,socket Wrench, manufactured by Apex Tool Group, Llc Dba Nicholson, classified under FSC 5120 (No Item Name Available). Status: active.

What are the part numbers for NSN 5120-01-647-3135?

NSN 5120-01-647-3135 has 6 cross-referenced part numbers: 81241 (Apex Tool Group, Llc Dba Nicholson), AS4283 TY2CL2 (General Services Administration Federal Supply Service), 11-922A (Armstrong Bros Tool Co), AS4283 (Sae International Dba Sae International), 11-922A (Apex Tool Group, Llc Dba Nicholson) and 1 more.

What NSN replaces 5120-01-647-3135?

There are 4 known substitutes for 5120-01-647-3135: 4720-01-015-4269, 5340-01-515-3764, 6220-01-582-5044 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 81241?

Key specifications for 81241: Overall Length: 2.870 INCHES MINIMUM AND 3.110 INCHES MAXIMUM IN; Specification/standard Data: 0U583-SAE AS4283 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD; Nondefinitive Spec/std Data: 2 TYPE AND 2 CLASS; Style Designator: RIGID. 4 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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