PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

TMCOS18Crowfoot Attachment,socket Wrenc

Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc · NSN 5120-00-541-4074 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-00-541-4074 — this item is cataloged by the U.S. Government under National Stock Number 5120-00-541-4074. Primary manufacturer part number: TMCOS18.
Features
  • Crowfoot Attachment,socket Wrenc — FSC 5120
  • Nondefinitive Spec/std Data: 1 TYPE AND 1 CLASS AND A STYLE AND A DESIGN
  • Wrenching Surface Size: 0.562 INCHES NOMINAL SINGLE END IN
  • Drive End Shape: SQUARE SINGLE END INTERNAL
  • Drive Surface Size: 0.250 INCHES NOMINAL SINGLE END IN
  • Wrenching Surface Shape: 12 POINT SINGLE END INTERNAL
  • Surface Treatment: CHROMIUM OVERALL
  • Specification/standard Data: 0U583-SAE AS4167 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
Applications
  • Applications requiring Steel Overall construction
General Description

The Crowfoot Attachment,socket Wrenc, cataloged under National Stock Number 5120-00-541-4074, is classified within Federal Supply Class 5120 (No Item Name Available) of the Hand Tools group. The primary manufacturer of record is Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc. Government technical data includes 12 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 19 commercial cross-references from 13 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5120-00-541-4074
Primary Part NumberTMCOS18
Item NameCrowfoot Attachment,socket Wrenc
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerIdsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc
StatusCANCELLED
Nondefinitive Spec/std Data1 TYPE AND 1 CLASS AND A STYLE AND A DESIGN
Wrenching Surface Size0.562 INCHES NOMINAL SINGLE END IN
Drive End ShapeSQUARE SINGLE END INTERNAL
Drive Surface Size0.250 INCHES NOMINAL SINGLE END IN
Wrenching Surface Shape12 POINT SINGLE END INTERNAL
Surface TreatmentCHROMIUM OVERALL
Specification/standard Data0U583-SAE AS4167 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
Environmental Attribute CodePLASTICS REMOVAL IN THE MARINE ENVIRONMENT (PRIME) PRODUCT
MaterialSTEEL OVERALL
Style DesignatorFLARE NUT
Opening Width0.363 INCHES NOMINAL IN
Head Thickness0.531 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5120-00-018-1553 INTERCHANGEABLE
Socket,socket Wrench
5120-00-082-8526 INTERCHANGEABLE
Socket,socket Wrench
5120-00-189-8609 INTERCHANGEABLE
Socket,socket Wrench
5120-00-227-6702 INTERCHANGEABLE
Socket,socket Wrench
5120-00-227-6703 INTERCHANGEABLE
Socket,socket Wrench
5120-00-235-5878 INTERCHANGEABLE
Socket,socket Wrench
5120-00-238-8266 INTERCHANGEABLE
Crowfoot Attachment,socket Wrenc
5120-00-540-26621C2671P1 INTERCHANGEABLE
Socket,socket Wrench
General Electric Company
5120-00-541-4072 INTERCHANGEABLE
Crowfoot Attachment,socket Wrenc
5120-00-541-4073 INTERCHANGEABLE
Crowfoot Attachment,socket Wrenc
Cross-Reference Index
Part NumberManufacturer
TMCOS18 PRIMARY Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc (USA)
10082522 Nimikkeistokeskus Ncb Finland (FIN)
VF-18 Utica Tool Co Inc (USA)
AN8508-9 Sna Germany Gmbh (DEU)
GGG-C-1507 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
N107.100 CAT 21 TY2CL1 General Services Administration Federal Supply Service (USA)
GGG-C-1507 TY1CL1 General Services Administration Federal Supply Service (USA)
45218 Utica Tool Co Inc (USA)
B107.100 The American Society of Mechanical Engineers (USA)
A16150-012 Bae Systems Information and Electronic Systems Integration Inc. Div Bae Systems Information & Electronic Systems Integration Inc (USA)
XWS2149 Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA)
B107.21 The American Society of Mechanical Engineers (USA)
B107.21 TY1CL1 General Services Administration Federal Supply Service (USA)
B107.21 TY1CL1STA General Services Administration Federal Supply Service (USA)
AS4167 Society of Automotive Engineers Inc (USA)
4245446-003 Ail Systems Inc Sub of Eaton Corp (USA)
AS4167 Sae International Dba Sae International (USA)
AS4167 TY1CL1STADEA General Services Administration Federal Supply Service (USA)
T1270-11 Brooks Automation, Inc. Div Cti Cryogenics (USA)
Related Parts
5120-00-018-1553INTERCHANGEABLE
SOCKET,SOCKET WRENCH
5120-00-082-8526INTERCHANGEABLE
SOCKET,SOCKET WRENCH
5120-00-189-8609INTERCHANGEABLE
SOCKET,SOCKET WRENCH
5120-00-227-6702INTERCHANGEABLE
SOCKET,SOCKET WRENCH
5120-00-227-6703INTERCHANGEABLE
SOCKET,SOCKET WRENCH
5120-00-235-5878INTERCHANGEABLE
SOCKET,SOCKET WRENCH
5120-00-238-8266INTERCHANGEABLE
CROWFOOT ATTACHMENT,SOCKET WRENC
5120-00-540-2662INTERCHANGEABLE
SOCKET,SOCKET WRENCH
1C2671P1
5120-00-541-4072INTERCHANGEABLE
CROWFOOT ATTACHMENT,SOCKET WRENC
5120-00-541-4073INTERCHANGEABLE
CROWFOOT ATTACHMENT,SOCKET WRENC
4720-00-571-5309INTERCHANGEABLE
HOSE,PREFORMED
26439
5120-00-867-5517INTERCHANGEABLE
ADAPTER,TORQUE WRENCH

Frequently Asked Questions

What is NSN 5120-00-541-4074?

NSN 5120-00-541-4074 is a Crowfoot Attachment,socket Wrenc, manufactured by Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc, classified under FSC 5120 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5120-00-541-4074?

NSN 5120-00-541-4074 has 19 cross-referenced part numbers: TMCOS18 (Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc), 10082522 (Nimikkeistokeskus Ncb Finland), VF-18 (Utica Tool Co Inc), AN8508-9 (Sna Germany Gmbh), GGG-C-1507 (Federal Specifications Promulgated by General Services Administration Washington DC) and 14 more.

What NSN replaces 5120-00-541-4074?

There are 12 known substitutes for 5120-00-541-4074: 5120-00-018-1553, 5120-00-082-8526, 5120-00-189-8609 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of TMCOS18?

Key specifications for TMCOS18: Nondefinitive Spec/std Data: 1 TYPE AND 1 CLASS AND A STYLE AND A DESIGN; Wrenching Surface Size: 0.562 INCHES NOMINAL SINGLE END IN; Drive End Shape: SQUARE SINGLE END INTERNAL; Drive Surface Size: 0.250 INCHES NOMINAL SINGLE END IN. 14 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5120-00-541-4074 still in active supply?

NSN 5120-00-541-4074 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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