PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

W-4Wedge,tool Handle

Ampco Partners, Ltd. Dba Ampco Safety Tools · NSN 5120-01-631-3977 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-01-631-3977 — this item is cataloged by the U.S. Government under National Stock Number 5120-01-631-3977. Primary manufacturer part number: W-4.
Features
  • Wedge,tool Handle — FSC 5120
  • Width: 1.5 INCHES NOMINAL IN
  • Length: 6.0 INCHES NOMINAL IN
  • Material: STEEL CORROSION RESISTING
  • 2 verified cross-references
  • Primary manufacturer: Ampco Partners, Ltd. Dba Ampco Safety Tools
Applications
  • Applications requiring Steel Corrosion Resisting construction
General Description

The Wedge,tool Handle, cataloged under National Stock Number 5120-01-631-3977, is classified within Federal Supply Class 5120 (No Item Name Available) of the Hand Tools group. The primary manufacturer of record is Ampco Partners, Ltd. Dba Ampco Safety Tools. Government technical data includes 3 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5120-01-631-3977
Primary Part NumberW-4
Item NameWedge,tool Handle
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerAmpco Partners, Ltd. Dba Ampco Safety Tools
StatusACTIVE
Width1.5 INCHES NOMINAL IN
Length6.0 INCHES NOMINAL IN
MaterialSTEEL CORROSION RESISTING
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
5120-00-142-5143W4 INTERCHANGEABLE
Wrench,pipe
Reliance Time Controls Inc
3426-00-243-3164W4 INTERCHANGEABLE
Tank,hot Dip,directly Heated
Aeroil Products Co Inc
3433-00-628-76840323-0130 INTERCHANGEABLE
Tip,welding Torch
Victor Equipment Co
3120-00-661-6781H3120-661-6781 INTERCHANGEABLE
Bearing,sleeve
Naval Inventory Control Point Mechanicsburg
5310-01-180-5093W4 INTERCHANGEABLE
Washer,lock
Mayline Co Inc
5340-01-242-6245W-4 INTERCHANGEABLE
Cap-Plug,protective,dust and Moi
Caplugs Llc Dba Mokon Div Caplugs
Cross-Reference Index
Part NumberManufacturer
W-4 PRIMARY Ampco Partners, Ltd. Dba Ampco Safety Tools (USA)
025820 Materiels Industriels De Securite Matisec (FRA)
Related Parts
5120-00-142-5143INTERCHANGEABLE
WRENCH,PIPE
W4
3426-00-243-3164INTERCHANGEABLE
TANK,HOT DIP,DIRECTLY HEATED
W4
3433-00-628-7684INTERCHANGEABLE
TIP,WELDING TORCH
0323-0130
3120-00-661-6781INTERCHANGEABLE
BEARING,SLEEVE
H3120-661-6781
5310-01-180-5093INTERCHANGEABLE
WASHER,LOCK
W4
5340-01-242-6245INTERCHANGEABLE
CAP-PLUG,PROTECTIVE,DUST AND MOI
W-4

Frequently Asked Questions

What is NSN 5120-01-631-3977?

NSN 5120-01-631-3977 is a Wedge,tool Handle, manufactured by Ampco Partners, Ltd. Dba Ampco Safety Tools, classified under FSC 5120 (No Item Name Available). Status: active.

What are the part numbers for NSN 5120-01-631-3977?

NSN 5120-01-631-3977 has 2 cross-referenced part numbers: W-4 (Ampco Partners, Ltd. Dba Ampco Safety Tools), 025820 (Materiels Industriels De Securite Matisec).

What NSN replaces 5120-01-631-3977?

There are 6 known substitutes for 5120-01-631-3977: 5120-00-142-5143, 3426-00-243-3164, 3433-00-628-7684 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of W-4?

Key specifications for W-4: Width: 1.5 INCHES NOMINAL IN; Length: 6.0 INCHES NOMINAL IN; Part Name Assigned by Controlling Agency: WEDGE, FLANGED; Material: STEEL CORROSION RESISTING. 4 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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