PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

3418Extension,socket Wrench

Wright Tool Co · NSN 5120-01-425-8921 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-01-425-8921 — this item is cataloged by the U.S. Government under National Stock Number 5120-01-425-8921. Primary manufacturer part number: 3418.
Features
  • Extension,socket Wrench — FSC 5120
  • Material: STEEL OVERALL
  • Drive Surface Size: 0.375 INCHES NOMINAL BOTH ENDS IN
  • Drive End Shape: SQUARE SECOND END EXTERNAL
  • Surface Treatment: CHROMIUM OVERALL
  • Style Designator: RIGID
  • Features Provided: MANUAL TOOL
  • Drive End Shape: SQUARE FIRST END INTERNAL
Applications
  • Applications requiring Steel Overall construction
General Description

The Extension,socket Wrench, cataloged under National Stock Number 5120-01-425-8921, is classified within Federal Supply Class 5120 (No Item Name Available) of the Hand Tools group. The primary manufacturer of record is Wright Tool Co. Government technical data includes 7 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. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5120-01-425-8921
Primary Part Number3418
Item NameExtension,socket Wrench
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerWright Tool Co
StatusACTIVE
MaterialSTEEL OVERALL
Drive Surface Size0.375 INCHES NOMINAL BOTH ENDS IN
Drive End ShapeSQUARE SECOND END EXTERNAL
Surface TreatmentCHROMIUM OVERALL
Style DesignatorRIGID
Features ProvidedMANUAL TOOL
Drive End ShapeSQUARE FIRST END INTERNAL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
5340-00-340-5250 INTERCHANGEABLE
Rivet
4730-00-839-4177A-4827 INTERCHANGEABLE
Adapter,straight,pipe to Tube
Mueller Brass Co.
4820-01-103-7507034180099 INTERCHANGEABLE
Valve,flow Control
Parker Hannifin Corp Fluidpower Group Schrader Bellows Pneumatic Div
2910-01-335-686933418 INTERCHANGEABLE
Filter Element,fluid
Wix Corp
3441-01-360-0397 INTERCHANGEABLE
Forming Machine,sheet Metal,slip
5930-01-412-3413800T-N129 INTERCHANGEABLE
Guard,switch
Rockwell Automation, Inc. Dba Rockwell Automation
5120-01-430-8585 INTERCHANGEABLE
Screwdriver,torque
6515-01-521-33683418 INTERCHANGEABLE
Blade,arthroscopic,surgical
Smith and Nephew Dyonics Inc Video Div
6515-01-668-06283418 INTERCHANGEABLE
Sensor,oxygen Monitoring
Masimo Corporation
Cross-Reference Index
Part NumberManufacturer
3418 PRIMARY Wright Tool Co (USA)
Related Parts
5340-00-340-5250INTERCHANGEABLE
RIVET
4730-00-839-4177INTERCHANGEABLE
ADAPTER,STRAIGHT,PIPE TO TUBE
A-4827
4820-01-103-7507INTERCHANGEABLE
VALVE,FLOW CONTROL
034180099
2910-01-335-6869INTERCHANGEABLE
FILTER ELEMENT,FLUID
33418
3441-01-360-0397INTERCHANGEABLE
FORMING MACHINE,SHEET METAL,SLIP
5930-01-412-3413INTERCHANGEABLE
GUARD,SWITCH
800T-N129
5120-01-430-8585INTERCHANGEABLE
SCREWDRIVER,TORQUE
6515-01-521-3368INTERCHANGEABLE
BLADE,ARTHROSCOPIC,SURGICAL
3418
6515-01-668-0628INTERCHANGEABLE
SENSOR,OXYGEN MONITORING
3418

Frequently Asked Questions

What is NSN 5120-01-425-8921?

NSN 5120-01-425-8921 is a Extension,socket Wrench, manufactured by Wright Tool Co, classified under FSC 5120 (No Item Name Available). Status: active.

What are the part numbers for NSN 5120-01-425-8921?

NSN 5120-01-425-8921 has 1 cross-referenced part number: 3418 (Wright Tool Co).

What NSN replaces 5120-01-425-8921?

There are 9 known substitutes for 5120-01-425-8921: 5340-00-340-5250, 4730-00-839-4177, 4820-01-103-7507 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 3418?

Key specifications for 3418: Overall Length: 9.719 INCHES NOMINAL IN; Material: STEEL OVERALL; Drive Surface Size: 0.375 INCHES NOMINAL BOTH ENDS IN; Drive End Shape: SQUARE SECOND END EXTERNAL. 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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