PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

37-081Socket,socket Wrench

Apex Tool Group, Llc Dba Nicholson · NSN 5120-01-654-2157 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-01-654-2157 — this item is cataloged by the U.S. Government under National Stock Number 5120-01-654-2157. Primary manufacturer part number: 37-081.
Features
  • Socket,socket Wrench — FSC 5120
  • Wrenching End Outside Diameter: 7.9 MILLIMETERS NOMINAL MM
  • Wrenching End Opening Depth: 4.6 MILLIMETERS NOMINAL MM
  • Drive End Outside Diameter: 11.5 MILLIMETERS NOMINAL MM
  • Style Designator: INTERNAL-INTERNAL
  • Surface Treatment: CHROMIUM OVERALL
  • Wrenching Surface Shape: 6 POINT SINGLE END INTERNAL
  • Wrenching Surface Size: 4.5 MILLIMETERS NOMINAL SINGLE END MM
Applications
  • Applications requiring Steel Overall construction
General Description

The Socket,socket Wrench, cataloged under National Stock Number 5120-01-654-2157, 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 11 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, 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
NSN5120-01-654-2157
Primary Part Number37-081
Item NameSocket,socket Wrench
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerApex Tool Group, Llc Dba Nicholson
StatusACTIVE
Wrenching End Outside Diameter7.9 MILLIMETERS NOMINAL MM
Wrenching End Opening Depth4.6 MILLIMETERS NOMINAL MM
Drive End Outside Diameter11.5 MILLIMETERS NOMINAL MM
Style DesignatorINTERNAL-INTERNAL
Surface TreatmentCHROMIUM OVERALL
Wrenching Surface Shape6 POINT SINGLE END INTERNAL
Wrenching Surface Size4.5 MILLIMETERS NOMINAL SINGLE END MM
Drive Surface Size0.250 INCHES NOMINAL SINGLE END IN
MaterialSTEEL OVERALL
Features ProvidedMANUAL TOOL
Drive End ShapeSQUARE SINGLE END INTERNAL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
5110-00-233-9688 INTERCHANGEABLE
File,hand
5110-00-239-3262 INTERCHANGEABLE
File,hand
5330-00-500-298137081 INTERCHANGEABLE
Gasket
Setra Systems, Inc. Dba Gems Sensors
5310-00-883-589837081 INTERCHANGEABLE
Washer,flat
Unison Industries Llc
6610-01-108-46873708-1 INTERCHANGEABLE
Mount,hairspring
Kearflex Engineering Company
Cross-Reference Index
Part NumberManufacturer
37-081 Apex Tool Group, Llc Dba Nicholson (USA)
Related Parts
5110-00-233-9688INTERCHANGEABLE
FILE,HAND
5110-00-239-3262INTERCHANGEABLE
FILE,HAND
5330-00-500-2981INTERCHANGEABLE
GASKET
37081
5310-00-883-5898INTERCHANGEABLE
WASHER,FLAT
37081
6610-01-108-4687INTERCHANGEABLE
MOUNT,HAIRSPRING
3708-1

Frequently Asked Questions

What is NSN 5120-01-654-2157?

NSN 5120-01-654-2157 is a Socket,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 5120-01-654-2157?

NSN 5120-01-654-2157 has 1 cross-referenced part number: 37-081 (Apex Tool Group, Llc Dba Nicholson).

What NSN replaces 5120-01-654-2157?

There are 5 known substitutes for 5120-01-654-2157: 5110-00-233-9688, 5110-00-239-3262, 5330-00-500-2981 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 37-081?

Key specifications for 37-081: Wrenching End Outside Diameter: 7.9 MILLIMETERS NOMINAL MM; Wrenching End Opening Depth: 4.6 MILLIMETERS NOMINAL MM; Drive End Outside Diameter: 11.5 MILLIMETERS NOMINAL MM; Overall Length: 22.2 MILLIMETERS NOMINAL MM. 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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