PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

39-015Socket,socket Wrench

Easco Hand Tools Inc Dba Danaher Tool Group Div Danaher Tool Group Easco Hand Tools Inc. · NSN 5120-01-579-0978 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-01-579-0978 — this item is cataloged by the U.S. Government under National Stock Number 5120-01-579-0978. Primary manufacturer part number: 39-015.
Features
  • Socket,socket Wrench — FSC 5120
  • Drive End Outside Diameter: 21.8 MILLIMETERS NOMINAL MM
  • Wrenching End Opening Depth: 10.2 MILLIMETERS NOMINAL MM
  • Style Designator: INTERNAL-INTERNAL
  • Drive Surface Size: 0.500 INCHES NOMINAL SINGLE END IN
  • Wrenching End Outside Diameter: 21.8 MILLIMETERS NOMINAL MM
  • Material: STEEL OVERALL
  • Surface Treatment: CHROMIUM OVERALL
Applications
  • Applications requiring Steel Overall construction
General Description

The Socket,socket Wrench, cataloged under National Stock Number 5120-01-579-0978, is classified within Federal Supply Class 5120 (No Item Name Available) of the Hand Tools group. The primary manufacturer of record is Easco Hand Tools Inc Dba Danaher Tool Group Div Danaher Tool Group Easco Hand Tools Inc.. Government technical data includes 11 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5120-01-579-0978
Primary Part Number39-015
Item NameSocket,socket Wrench
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerEasco Hand Tools Inc Dba Danaher Tool Group Div Danaher Tool Group Easco Hand Tools Inc.
StatusACTIVE
Drive End Outside Diameter21.8 MILLIMETERS NOMINAL MM
Wrenching End Opening Depth10.2 MILLIMETERS NOMINAL MM
Style DesignatorINTERNAL-INTERNAL
Drive Surface Size0.500 INCHES NOMINAL SINGLE END IN
Wrenching End Outside Diameter21.8 MILLIMETERS NOMINAL MM
MaterialSTEEL OVERALL
Surface TreatmentCHROMIUM OVERALL
Features ProvidedMANUAL TOOL
Wrenching Surface Shape6 POINT SINGLE END INTERNAL
Drive End ShapeSQUARE SINGLE END INTERNAL
Wrenching Surface Size15.0 MILLIMETERS NOMINAL SINGLE END MM
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
6240-00-069-803839-015 INTERCHANGEABLE
Lamp,flashtube
Ross Laboratories, Inc.
5961-00-116-8950352-0825-020 INTERCHANGEABLE
Transistor
Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems
3110-01-061-3235 INTERCHANGEABLE
Bearing,needle
5935-01-074-86071133017G1 INTERCHANGEABLE
Connector,receptacle,electrical
L3harris Technologies, Inc. Dba Harris Corporation
6220-01-180-9017 INTERCHANGEABLE
Lens,light
Cross-Reference Index
Part NumberManufacturer
39-015 Easco Hand Tools Inc Dba Danaher Tool Group Div Danaher Tool Group Easco Hand Tools Inc. (USA)
39-015 Apex Tool Group, Llc Dba Nicholson (USA)
39-015 Armstrong Bros Tool Co (USA)
Related Parts
6240-00-069-8038INTERCHANGEABLE
LAMP,FLASHTUBE
39-015
5961-00-116-8950INTERCHANGEABLE
TRANSISTOR
352-0825-020
3110-01-061-3235INTERCHANGEABLE
BEARING,NEEDLE
5935-01-074-8607INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
1133017G1
6220-01-180-9017INTERCHANGEABLE
LENS,LIGHT

Frequently Asked Questions

What is NSN 5120-01-579-0978?

NSN 5120-01-579-0978 is a Socket,socket Wrench, manufactured by Easco Hand Tools Inc Dba Danaher Tool Group Div Danaher Tool Group Easco Hand Tools Inc., classified under FSC 5120 (No Item Name Available). Status: active.

What are the part numbers for NSN 5120-01-579-0978?

NSN 5120-01-579-0978 has 3 cross-referenced part numbers: 39-015 (Easco Hand Tools Inc Dba Danaher Tool Group Div Danaher Tool Group Easco Hand Tools Inc.), 39-015 (Apex Tool Group, Llc Dba Nicholson), 39-015 (Armstrong Bros Tool Co).

What NSN replaces 5120-01-579-0978?

There are 5 known substitutes for 5120-01-579-0978: 6240-00-069-8038, 5961-00-116-8950, 3110-01-061-3235 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 39-015?

Key specifications for 39-015: Drive End Outside Diameter: 21.8 MILLIMETERS NOMINAL MM; Wrenching End Opening Depth: 10.2 MILLIMETERS NOMINAL MM; Style Designator: INTERNAL-INTERNAL; Drive Surface Size: 0.500 INCHES NOMINAL SINGLE END IN. 12 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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