PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

W-261Socket,socket Wrench

Ampco Partners, Ltd. Dba Ampco Safety Tools · NSN 5120-00-222-2020 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-00-222-2020 — this item is cataloged by the U.S. Government under National Stock Number 5120-00-222-2020. Primary manufacturer part number: W-261.
Features
  • Socket,socket Wrench — FSC 5120
  • Drive End Outside Diameter: 0.843 INCHES NOMINAL IN
  • Material: COPPER ALLOY OVERALL
  • Style Designator: INTERNAL-INTERNAL
  • Drive Surface Size: 0.500 INCHES NOMINAL SINGLE END IN
  • Drive End Shape: SQUARE SINGLE END INTERNAL
  • Features Provided: MANUAL TOOL AND NONSPARKING AND NONMAGNETIC
  • Wrenching Surface Shape: 12 POINT SINGLE END INTERNAL
Applications
  • Applications requiring Copper Alloy Overall construction
General Description

The Socket,socket Wrench, cataloged under National Stock Number 5120-00-222-2020, 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 11 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5120-00-222-2020
Primary Part NumberW-261
Item NameSocket,socket Wrench
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerAmpco Partners, Ltd. Dba Ampco Safety Tools
StatusACTIVE
Drive End Outside Diameter0.843 INCHES NOMINAL IN
MaterialCOPPER ALLOY OVERALL
Style DesignatorINTERNAL-INTERNAL
Drive Surface Size0.500 INCHES NOMINAL SINGLE END IN
Drive End ShapeSQUARE SINGLE END INTERNAL
Features ProvidedMANUAL TOOL AND NONSPARKING AND NONMAGNETIC
Wrenching Surface Shape12 POINT SINGLE END INTERNAL
Wrenching Surface Size0.438 INCHES NOMINAL SINGLE END IN
Special Markings7/16 IN. IN
Wrenching End Opening Depth0.438 INCHES NOMINAL IN
Wrenching End Outside Diameter0.625 INCHES MINIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
2930-00-180-64458551 INTERCHANGEABLE
Pump,package
Elgin Industries Inc. Dba
Cross-Reference Index
Part NumberManufacturer
410 1434 Ampco Metal Inc. Dba Ampco Metal Inc (USA)
W-261 PRIMARY Ampco Partners, Ltd. Dba Ampco Safety Tools (USA)
W-261 Ampco Metal Inc. Dba Ampco Metal Inc (USA)
W-924-2497 Ngk Metals Corporation Dba N G K Berylco (USA)
W-924 PRIMARY Ngk Metals Corporation Dba N G K Berylco (USA)
Related Parts
2930-00-180-6445INTERCHANGEABLE
PUMP,PACKAGE
8551

Frequently Asked Questions

What is NSN 5120-00-222-2020?

NSN 5120-00-222-2020 is a Socket,socket Wrench, 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 5120-00-222-2020?

NSN 5120-00-222-2020 has 5 cross-referenced part numbers: 410 1434 (Ampco Metal Inc. Dba Ampco Metal Inc), W-261 (Ampco Partners, Ltd. Dba Ampco Safety Tools), W-261 (Ampco Metal Inc. Dba Ampco Metal Inc), W-924-2497 (Ngk Metals Corporation Dba N G K Berylco), W-924 (Ngk Metals Corporation Dba N G K Berylco).

What NSN replaces 5120-00-222-2020?

There is 1 known substitute for 5120-00-222-2020: 2930-00-180-6445. Verify interchangeability with system specifications before substitution.

What are the specifications of W-261?

Key specifications for W-261: Drive End Outside Diameter: 0.843 INCHES NOMINAL IN; Overall Length: 1.500 INCHES NOMINAL IN; Material: COPPER ALLOY OVERALL; Style Designator: INTERNAL-INTERNAL. 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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