PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

00943537000Extension,socket Wrench

Sears, Roebuck and Co. Dba Sears Div Sears Commercial · NSN 5120-01-398-7661 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-01-398-7661 — this item is cataloged by the U.S. Government under National Stock Number 5120-01-398-7661. Primary manufacturer part number: 00943537000.
Features
  • Extension,socket Wrench — FSC 5120
  • Material: STEEL OVERALL
  • Style Designator: RIGID
  • Drive End Shape: SQUARE SECOND END EXTERNAL
  • Drive Surface Size: 0.375 INCHES NOMINAL BOTH ENDS IN
  • Surface Treatment: CHROMIUM OVERALL
  • Drive End Shape: SQUARE FIRST END INTERNAL
  • Features Provided: MANUAL TOOL
Applications
  • Applications requiring Steel Overall construction
General Description

The Extension,socket Wrench, cataloged under National Stock Number 5120-01-398-7661, is classified within Federal Supply Class 5120 (No Item Name Available) of the Hand Tools group. The primary manufacturer of record is Sears, Roebuck and Co. Dba Sears Div Sears Commercial. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5120-01-398-7661
Primary Part Number00943537000
Item NameExtension,socket Wrench
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerSears, Roebuck and Co. Dba Sears Div Sears Commercial
StatusACTIVE
MaterialSTEEL OVERALL
Style DesignatorRIGID
Drive End ShapeSQUARE SECOND END EXTERNAL
Drive Surface Size0.375 INCHES NOMINAL BOTH ENDS IN
Surface TreatmentCHROMIUM OVERALL
Drive End ShapeSQUARE FIRST END INTERNAL
Features ProvidedMANUAL TOOL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
5950-01-025-2268792536-1 INTERCHANGEABLE
Transformer,power
Raytheon Company Dba Raytheon
3040-01-342-291543537 INTERCHANGEABLE
Ring Set,piston
Eaton Aerospace Llc Dba Eaton Aerospace Jackson
3455-01-602-998143-537 INTERCHANGEABLE
Reamer,machine
Pan American Tool Corp
Cross-Reference Index
Part NumberManufacturer
43537 Sears, Roebuck and Co. Dba Sears Div Sears Commercial (USA)
00943537000 PRIMARY Sears, Roebuck and Co. Dba Sears Div Sears Commercial (USA)
9-43537 Sears, Roebuck and Co. Dba Sears Div Sears Commercial (USA)
Related Parts
5950-01-025-2268INTERCHANGEABLE
TRANSFORMER,POWER
792536-1
3040-01-342-2915INTERCHANGEABLE
RING SET,PISTON
43537
3455-01-602-9981INTERCHANGEABLE
REAMER,MACHINE
43-537

Frequently Asked Questions

What is NSN 5120-01-398-7661?

NSN 5120-01-398-7661 is a Extension,socket Wrench, manufactured by Sears, Roebuck and Co. Dba Sears Div Sears Commercial, classified under FSC 5120 (No Item Name Available). Status: active.

What are the part numbers for NSN 5120-01-398-7661?

NSN 5120-01-398-7661 has 3 cross-referenced part numbers: 43537 (Sears, Roebuck and Co. Dba Sears Div Sears Commercial), 00943537000 (Sears, Roebuck and Co. Dba Sears Div Sears Commercial), 9-43537 (Sears, Roebuck and Co. Dba Sears Div Sears Commercial).

What NSN replaces 5120-01-398-7661?

There are 3 known substitutes for 5120-01-398-7661: 5950-01-025-2268, 3040-01-342-2915, 3455-01-602-9981. Verify interchangeability with system specifications before substitution.

What are the specifications of 00943537000?

Key specifications for 00943537000: Material: STEEL OVERALL; Style Designator: RIGID; Drive End Shape: SQUARE SECOND END EXTERNAL; Drive Surface Size: 0.375 INCHES NOMINAL BOTH ENDS IN. 8 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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