PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

12-937Extension,socket Wrench

Easco Hand Tools Inc Dba Danaher Tool Group Div Danaher Tool Group Easco Hand Tools Inc. · NSN 5120-01-601-5173 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-01-601-5173 — this item is cataloged by the U.S. Government under National Stock Number 5120-01-601-5173. Primary manufacturer part number: 12-937.
Features
  • Extension,socket Wrench — FSC 5120
  • Surface Treatment: CHROMIUM OVERALL
  • Style Designator: RIGID
  • Features Provided: MANUAL TOOL
  • Specification/standard Data: 0U583-SAE AS4283 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
  • Drive End Shape: SQUARE FIRST END INTERNAL
  • Drive End Shape: SQUARE SECOND END EXTERNAL
  • Drive Surface Size: 0.500 INCHES NOMINAL BOTH ENDS IN
Applications
  • Applications requiring Steel Overall construction
General Description

The Extension,socket Wrench, cataloged under National Stock Number 5120-01-601-5173, 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 9 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 8 commercial cross-references from 7 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5120-01-601-5173
Primary Part Number12-937
Item NameExtension,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
Surface TreatmentCHROMIUM OVERALL
Style DesignatorRIGID
Features ProvidedMANUAL TOOL
Specification/standard Data0U583-SAE AS4283 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
Drive End ShapeSQUARE FIRST END INTERNAL
Drive End ShapeSQUARE SECOND END EXTERNAL
Drive Surface Size0.500 INCHES NOMINAL BOTH ENDS IN
MaterialSTEEL OVERALL
Nondefinitive Spec/std Data2 TYPE AND 2 CLASS
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5930-00-139-88851293-7 INTERCHANGEABLE
Switch,pressure
Hydra-Electric Company Dba Hydra-Electric Co
5905-00-202-062412937 INTERCHANGEABLE
Resistor,variable,nonwire Wound,
Magna Tech Electronic Co Inc Dba Mte
4940-00-204-2896TGC545 INTERCHANGEABLE
Cup,paint,spray Gun
Illinois Tool Works Inc.
5325-00-286-6047 INTERCHANGEABLE
Grommet,nonmetallic
3040-00-369-3672291236 INTERCHANGEABLE
Shaft,shouldered
Itw Food Equipment Group Llc Dba Hobart Service
6930-00-373-959981350 INTERCHANGEABLE
Indicator Assemblyx
Cae Usa Inc.
5310-00-418-2121129-37 INTERCHANGEABLE
Nut,hexagon
Cnh Industrial America Llc Dba Cnh America
5360-00-864-112112937 INTERCHANGEABLE
Spring,special
Itt Aerospace Controls Llc Dba Itt Aerospace Controls Unit S
6515-01-179-2968 INTERCHANGEABLE
Blood Recipient Set,indirect Tra
6145-01-273-007712937 INTERCHANGEABLE
Cable,special Purpose,electrical
Rscc Wire & Cable Llc Dba Marmon Industrial Energy & Infrastructure - East Granby
Cross-Reference Index
Part NumberManufacturer
12-937 Easco Hand Tools Inc Dba Danaher Tool Group Div Danaher Tool Group Easco Hand Tools Inc. (USA)
AS4283 Society of Automotive Engineers Inc (USA)
AS4283 Sae International Dba Sae International (USA)
AS4283 TY2CL2 General Services Administration Federal Supply Service (USA)
12-937 Armstrong Bros Tool Co (USA)
456720012206 Ncb Hungary (honvedsegi Egyseges Termekkod) (HUN)
81350 Apex Tool Group, Llc Dba Nicholson (USA)
12-937 Apex Tool Group, Llc Dba Nicholson (USA)
Related Parts
5930-00-139-8885INTERCHANGEABLE
SWITCH,PRESSURE
1293-7
5905-00-202-0624INTERCHANGEABLE
RESISTOR,VARIABLE,NONWIRE WOUND,
12937
4940-00-204-2896INTERCHANGEABLE
CUP,PAINT,SPRAY GUN
TGC545
5325-00-286-6047INTERCHANGEABLE
GROMMET,NONMETALLIC
3040-00-369-3672INTERCHANGEABLE
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291236
6930-00-373-9599INTERCHANGEABLE
INDICATOR ASSEMBLYX
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5310-00-418-2121INTERCHANGEABLE
NUT,HEXAGON
129-37
5360-00-864-1121INTERCHANGEABLE
SPRING,SPECIAL
12937
6515-01-179-2968INTERCHANGEABLE
BLOOD RECIPIENT SET,INDIRECT TRA
6145-01-273-0077INTERCHANGEABLE
CABLE,SPECIAL PURPOSE,ELECTRICAL
12937
7045-01-324-0867INTERCHANGEABLE
TAPE,ELECTRONIC DATA PROCESSING
3010-01-340-0446INTERCHANGEABLE
GEAR ASSEMBLY,SPEED DECREASER
12937

Frequently Asked Questions

What is NSN 5120-01-601-5173?

NSN 5120-01-601-5173 is a Extension,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 5120-01-601-5173?

NSN 5120-01-601-5173 has 8 cross-referenced part numbers: 12-937 (Easco Hand Tools Inc Dba Danaher Tool Group Div Danaher Tool Group Easco Hand Tools Inc.), AS4283 (Society of Automotive Engineers Inc), AS4283 (Sae International Dba Sae International), AS4283 TY2CL2 (General Services Administration Federal Supply Service), 12-937 (Armstrong Bros Tool Co) and 3 more.

What NSN replaces 5120-01-601-5173?

There are 12 known substitutes for 5120-01-601-5173: 5930-00-139-8885, 5905-00-202-0624, 4940-00-204-2896 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 12-937?

Key specifications for 12-937: Overall Length: 9.750 INCHES MINIMUM AND 10.250 INCHES MAXIMUM IN; Surface Treatment: CHROMIUM OVERALL; Style Designator: RIGID; Features Provided: MANUAL TOOL. 11 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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