PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

81244Extension,socket Wrench

Apex Tool Group, Llc Dba Nicholson · NSN 5120-01-397-3306 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-01-397-3306 — this item is cataloged by the U.S. Government under National Stock Number 5120-01-397-3306. Primary manufacturer part number: 81244.
Features
  • Extension,socket Wrench — FSC 5120
  • Material: STEEL OVERALL
  • Features Provided: MANUAL TOOL
  • Drive Surface Size: 0.375 INCHES NOMINAL BOTH ENDS IN
  • Drive End Shape: SQUARE SECOND END EXTERNAL
  • Surface Treatment: CHROMIUM OVERALL
  • Style Designator: RIGID
  • Drive End Shape: SQUARE FIRST END INTERNAL
Applications
  • Applications requiring Steel Overall construction
General Description

The Extension,socket Wrench, cataloged under National Stock Number 5120-01-397-3306, 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 7 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. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5120-01-397-3306
Primary Part Number81244
Item NameExtension,socket Wrench
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerApex Tool Group, Llc Dba Nicholson
StatusACTIVE
MaterialSTEEL OVERALL
Features ProvidedMANUAL TOOL
Drive Surface Size0.375 INCHES NOMINAL BOTH ENDS IN
Drive End ShapeSQUARE SECOND END EXTERNAL
Surface TreatmentCHROMIUM OVERALL
Style DesignatorRIGID
Drive End ShapeSQUARE FIRST END INTERNAL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
6130-00-262-0422 INTERCHANGEABLE
Rectifier,electropl
5310-00-727-570781244 INTERCHANGEABLE
Washer,flat
L3harris Technologies, Inc Div Space & Airborne Systems
5815-00-784-1533SM-C-187640 INTERCHANGEABLE
Bracket
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
3920-00-975-02098020000 INTERCHANGEABLE
Truck,hand
Labconco Corp
4920-00-976-9527 INTERCHANGEABLE
Amplifier
5999-01-045-186011927 INTERCHANGEABLE
Delay Line
Stanford Applied Engineering Inc
2590-01-284-918881244 INTERCHANGEABLE
Control Assembly,push-Pull
M-B Companies, Inc
5120-01-430-7730 INTERCHANGEABLE
Adapter,socket Wrench
5340-01-515-4607 INTERCHANGEABLE
Pad,cushioning
5305-01-674-461711927 INTERCHANGEABLE
Screw,cap,socket Head
Aimpoint Inc Dba Aimpoint Inc
Cross-Reference Index
Part NumberManufacturer
81244 Apex Tool Group, Llc Dba Nicholson (USA)
11-927 Armstrong Bros Tool Co (USA)
11-927 Apex Tool Group, Llc Dba Nicholson (USA)
11A7000771-3 Devcom Chemical Biological Center Dba Chemical Biological Center Div U.s. Dept of Army (USA)
11-927 Easco Hand Tools Inc Dba Danaher Tool Group Div Danaher Tool Group Easco Hand Tools Inc. (USA)
Related Parts
6130-00-262-0422INTERCHANGEABLE
RECTIFIER,ELECTROPL
5310-00-727-5707INTERCHANGEABLE
WASHER,FLAT
81244
5815-00-784-1533INTERCHANGEABLE
BRACKET
SM-C-187640
3920-00-975-0209INTERCHANGEABLE
TRUCK,HAND
8020000
4920-00-976-9527INTERCHANGEABLE
AMPLIFIER
5999-01-045-1860INTERCHANGEABLE
DELAY LINE
11927
2590-01-284-9188INTERCHANGEABLE
CONTROL ASSEMBLY,PUSH-PULL
81244
5120-01-430-7730INTERCHANGEABLE
ADAPTER,SOCKET WRENCH
5340-01-515-4607INTERCHANGEABLE
PAD,CUSHIONING
5305-01-674-4617INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD
11927

Frequently Asked Questions

What is NSN 5120-01-397-3306?

NSN 5120-01-397-3306 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 5120-01-397-3306?

NSN 5120-01-397-3306 has 5 cross-referenced part numbers: 81244 (Apex Tool Group, Llc Dba Nicholson), 11-927 (Armstrong Bros Tool Co), 11-927 (Apex Tool Group, Llc Dba Nicholson), 11A7000771-3 (Devcom Chemical Biological Center Dba Chemical Biological Center Div U.s. Dept of Army), 11-927 (Easco Hand Tools Inc Dba Danaher Tool Group Div Danaher Tool Group Easco Hand Tools Inc.).

What NSN replaces 5120-01-397-3306?

There are 10 known substitutes for 5120-01-397-3306: 6130-00-262-0422, 5310-00-727-5707, 5815-00-784-1533 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 81244?

Key specifications for 81244: Material: STEEL OVERALL; End Item Identification: ARSS; Features Provided: MANUAL TOOL; Drive Surface Size: 0.375 INCHES NOMINAL BOTH ENDS IN. 9 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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