PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

B107.21Crowfoot Attachment,socket Wrenc

The American Society of Mechanical Engineers · NSN 5120-01-335-1102 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-01-335-1102 — this item is cataloged by the U.S. Government under National Stock Number 5120-01-335-1102. Primary manufacturer part number: B107.21.
Features
  • Crowfoot Attachment,socket Wrenc — FSC 5120
  • Nondefinitive Spec/std Data: 2 TYPE AND 1 CLASS
  • Style Designator: OPEN END CAMBER
  • Specification/standard Data: 05047-ASME B107.100 CAT 21 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
  • Material: STEEL OVERALL
  • Surface Treatment: CHROMIUM OVERALL
  • Wrenching Surface Size: 1.062 INCHES NOMINAL SINGLE END IN
  • Drive End Shape: SQUARE SINGLE END INTERNAL
Applications
  • Applications requiring Steel Overall construction
General Description

The Crowfoot Attachment,socket Wrenc, cataloged under National Stock Number 5120-01-335-1102, is classified within Federal Supply Class 5120 (No Item Name Available) of the Hand Tools group. The primary manufacturer of record is The American Society of Mechanical Engineers. Government technical data includes 9 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 13 commercial cross-references from 7 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5120-01-335-1102
Primary Part NumberB107.21
Item NameCrowfoot Attachment,socket Wrenc
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerThe American Society of Mechanical Engineers
StatusCANCELLED
Nondefinitive Spec/std Data2 TYPE AND 1 CLASS
Style DesignatorOPEN END CAMBER
Specification/standard Data05047-ASME B107.100 CAT 21 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
MaterialSTEEL OVERALL
Surface TreatmentCHROMIUM OVERALL
Wrenching Surface Size1.062 INCHES NOMINAL SINGLE END IN
Drive End ShapeSQUARE SINGLE END INTERNAL
Drive Surface Size0.375 INCHES NOMINAL SINGLE END IN
Wrenching Surface ShapeOVAL SINGLE END INTERNAL
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 8
5120-00-184-8383 INTERCHANGEABLE
Crowfoot Attachment,socket Wrenc
5120-00-184-8384 INTERCHANGEABLE
Crowfoot Attachment,socket Wrenc
5120-00-184-8397 INTERCHANGEABLE
Crowfoot Attachment,socket Wrenc
5120-00-184-8398 INTERCHANGEABLE
Crowfoot Attachment,socket Wrenc
5120-00-184-8410 INTERCHANGEABLE
Crowfoot Attachment,socket Wrenc
5120-00-184-8411 INTERCHANGEABLE
Crowfoot Attachment,socket Wrenc
5120-00-184-8418 INTERCHANGEABLE
Crowfoot Attachment,socket Wrenc
6510-00-597-74693611 INTERCHANGEABLE
Bandage,adhesive
Dynarex Corp
Cross-Reference Index
Part NumberManufacturer
B107.21 The American Society of Mechanical Engineers (USA)
B107.100 The American Society of Mechanical Engineers (USA)
4492861347 Lemvigh-Muller A/s (DNK)
B107.21 TY2CL1 General Services Administration Federal Supply Service (USA)
B107.100 CAT 21 TY2CL1 General Services Administration Federal Supply Service (USA)
B107.21 TY2CL2STA General Services Administration Federal Supply Service (USA)
5120PL0946490 Jednolity Indeks Materialowy - Uniform Material Index (POL)
FC34 Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc (USA)
GGG-C-1507 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
FC34B Snap-on Tools (australia) Pty Ltd (AUS)
GGG-C-1507 TY2 General Services Administration Federal Supply Service (USA)
FC34B Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc (USA)
FC34A Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc (USA)
Related Parts
5120-00-184-8383INTERCHANGEABLE
CROWFOOT ATTACHMENT,SOCKET WRENC
5120-00-184-8384INTERCHANGEABLE
CROWFOOT ATTACHMENT,SOCKET WRENC
5120-00-184-8397INTERCHANGEABLE
CROWFOOT ATTACHMENT,SOCKET WRENC
5120-00-184-8398INTERCHANGEABLE
CROWFOOT ATTACHMENT,SOCKET WRENC
5120-00-184-8410INTERCHANGEABLE
CROWFOOT ATTACHMENT,SOCKET WRENC
5120-00-184-8411INTERCHANGEABLE
CROWFOOT ATTACHMENT,SOCKET WRENC
5120-00-184-8418INTERCHANGEABLE
CROWFOOT ATTACHMENT,SOCKET WRENC
6510-00-597-7469INTERCHANGEABLE
BANDAGE,ADHESIVE
3611

Frequently Asked Questions

What is NSN 5120-01-335-1102?

NSN 5120-01-335-1102 is a Crowfoot Attachment,socket Wrenc, manufactured by The American Society of Mechanical Engineers, classified under FSC 5120 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5120-01-335-1102?

NSN 5120-01-335-1102 has 13 cross-referenced part numbers: B107.21 (The American Society of Mechanical Engineers), B107.100 (The American Society of Mechanical Engineers), 4492861347 (Lemvigh-Muller A/s), B107.21 TY2CL1 (General Services Administration Federal Supply Service), B107.100 CAT 21 TY2CL1 (General Services Administration Federal Supply Service) and 8 more.

What NSN replaces 5120-01-335-1102?

There are 8 known substitutes for 5120-01-335-1102: 5120-00-184-8383, 5120-00-184-8384, 5120-00-184-8397 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of B107.21?

Key specifications for B107.21: Nondefinitive Spec/std Data: 2 TYPE AND 1 CLASS; Style Designator: OPEN END CAMBER; Specification/standard Data: 05047-ASME B107.100 CAT 21 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD; Material: STEEL OVERALL. 11 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5120-01-335-1102 still in active supply?

NSN 5120-01-335-1102 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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