PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

GGG-W-646 TY1CL1STBFMACrowfoot Attachment,socket Wrenc

General Services Administration Federal Supply Service · NSN 5120-00-222-7975 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-00-222-7975 — this item is cataloged by the U.S. Government under National Stock Number 5120-00-222-7975. Primary manufacturer part number: GGG-W-646 TY1CL1STBFMA.
Features
  • Crowfoot Attachment,socket Wrenc — FSC 5120
  • Material: STEEL OVERALL
  • Wrenching Surface Shape: 6 POINT SINGLE END INTERNAL
  • Drive Surface Size: 0.375 INCHES NOMINAL SINGLE END IN
  • Style Designator: FLARE NUT
  • Wrenching Surface Size: 0.562 INCHES NOMINAL SINGLE END IN
  • Nondefinitive Spec/std Data: B STYLE AND A FORM
  • 4 verified cross-references
Applications
  • Applications requiring Steel Overall construction
General Description

The Crowfoot Attachment,socket Wrenc, cataloged under National Stock Number 5120-00-222-7975, is classified within Federal Supply Class 5120 (No Item Name Available) of the Hand Tools group. The primary manufacturer of record is General Services Administration Federal Supply Service. Government technical data includes 6 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 3 manufacturers, 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
NSN5120-00-222-7975
Primary Part NumberGGG-W-646 TY1CL1STBFMA
Item NameCrowfoot Attachment,socket Wrenc
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerGeneral Services Administration Federal Supply Service
StatusACTIVE
MaterialSTEEL OVERALL
Wrenching Surface Shape6 POINT SINGLE END INTERNAL
Drive Surface Size0.375 INCHES NOMINAL SINGLE END IN
Style DesignatorFLARE NUT
Wrenching Surface Size0.562 INCHES NOMINAL SINGLE END IN
Nondefinitive Spec/std DataB STYLE AND A FORM
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
5120-00-277-36618708915 INTERCHANGEABLE
Head,crowfoot Socket Wrench
U S Army Tank Automotive Command Amsta-Im-Mm
5120-00-277-36628708916 INTERCHANGEABLE
Head,crowfoot Socket Wrench
U S Army Tank Automotive Command Amsta-Im-Mm
5120-00-277-36638708917 INTERCHANGEABLE
Head,crowfoot Socket Wrench
U S Army Tank Automotive Command Amsta-Im-Mm
5120-00-277-36648708918 INTERCHANGEABLE
Head,crowfoot Socket Wrench
U S Army Tank Automotive Command Amsta-Im-Mm
5120-00-277-3665 INTERCHANGEABLE
Head,crowfoot Socket Wrench
3120-00-287-7469AA304-1 INTERCHANGEABLE
Bearing,sleeve
Chrysler Corp Amplex Div
5120-00-288-6502 INTERCHANGEABLE
Head,crowfoot Socket Wrench
5120-00-288-6510 INTERCHANGEABLE
Head,crowfoot Socket Wrench
5120-00-595-8264 INTERCHANGEABLE
Head,crowfoot Socket Wrench
Cross-Reference Index
Part NumberManufacturer
GGG-W-646 TY1CL1STBFMA General Services Administration Federal Supply Service (USA)
GGG-W-646 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
A-A-3041 Federal Commercial Item Description Promulgated by General Services Administration Washington DC (USA)
A-A-3041 STBFMA General Services Administration Federal Supply Service (USA)
Related Parts
5120-00-277-3661INTERCHANGEABLE
HEAD,CROWFOOT SOCKET WRENCH
8708915
5120-00-277-3662INTERCHANGEABLE
HEAD,CROWFOOT SOCKET WRENCH
8708916
5120-00-277-3663INTERCHANGEABLE
HEAD,CROWFOOT SOCKET WRENCH
8708917
5120-00-277-3664INTERCHANGEABLE
HEAD,CROWFOOT SOCKET WRENCH
8708918
5120-00-277-3665INTERCHANGEABLE
HEAD,CROWFOOT SOCKET WRENCH
3120-00-287-7469INTERCHANGEABLE
BEARING,SLEEVE
AA304-1
5120-00-288-6502INTERCHANGEABLE
HEAD,CROWFOOT SOCKET WRENCH
5120-00-288-6510INTERCHANGEABLE
HEAD,CROWFOOT SOCKET WRENCH
5120-00-595-8264INTERCHANGEABLE
HEAD,CROWFOOT SOCKET WRENCH

Frequently Asked Questions

What is NSN 5120-00-222-7975?

NSN 5120-00-222-7975 is a Crowfoot Attachment,socket Wrenc, manufactured by General Services Administration Federal Supply Service, classified under FSC 5120 (No Item Name Available). Status: active.

What are the part numbers for NSN 5120-00-222-7975?

NSN 5120-00-222-7975 has 4 cross-referenced part numbers: GGG-W-646 TY1CL1STBFMA (General Services Administration Federal Supply Service), GGG-W-646 (Federal Specifications Promulgated by General Services Administration Washington DC), A-A-3041 (Federal Commercial Item Description Promulgated by General Services Administration Washington DC), A-A-3041 STBFMA (General Services Administration Federal Supply Service).

What NSN replaces 5120-00-222-7975?

There are 9 known substitutes for 5120-00-222-7975: 5120-00-277-3661, 5120-00-277-3662, 5120-00-277-3663 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of GGG-W-646 TY1CL1STBFMA?

Key specifications for GGG-W-646 TY1CL1STBFMA: Material: STEEL OVERALL; Wrenching Surface Shape: 6 POINT SINGLE END INTERNAL; Drive Surface Size: 0.375 INCHES NOMINAL SINGLE END IN; Style Designator: FLARE NUT. 6 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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