PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21C2404P018Crowfoot Attachment,socket Wrenc

General Electric Company · NSN 5120-00-953-3410 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-00-953-3410 — this item is cataloged by the U.S. Government under National Stock Number 5120-00-953-3410. Primary manufacturer part number: 21C2404P018.
Features
  • Crowfoot Attachment,socket Wrenc — FSC 5120
  • Material: STEEL COMP 4340 OVERALL
  • Special Markings: 1/2 IN. SIZE IN
  • Wrenching Surface Size: 0.500 INCHES NOMINAL SINGLE END IN
  • Wrenching Surface Shape: 12 POINT SINGLE END INTERNAL
  • Style Designator: FLARE NUT
  • Drive Surface Size: 0.250 INCHES NOMINAL SINGLE END IN
  • Surface Treatment: NICKEL AND CHROMIUM OVERALL
Applications
  • Applications requiring Steel Comp 4340 Overall construction
General Description

The Crowfoot Attachment,socket Wrenc, cataloged under National Stock Number 5120-00-953-3410, is classified within Federal Supply Class 5120 (No Item Name Available) of the Hand Tools group. The primary manufacturer of record is General Electric Company. Government technical data includes 10 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5120-00-953-3410
Primary Part Number21C2404P018
Item NameCrowfoot Attachment,socket Wrenc
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerGeneral Electric Company
StatusACTIVE
MaterialSTEEL COMP 4340 OVERALL
Special Markings1/2 IN. SIZE IN
Wrenching Surface Size0.500 INCHES NOMINAL SINGLE END IN
Wrenching Surface Shape12 POINT SINGLE END INTERNAL
Style DesignatorFLARE NUT
Drive Surface Size0.250 INCHES NOMINAL SINGLE END IN
Surface TreatmentNICKEL AND CHROMIUM OVERALL
Drive End ShapeSQUARE SINGLE END INTERNAL
Opening Width0.322 INCHES MINIMUM IN
Head Thickness0.562 INCHES MINIMUM AND 0.624 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
4320-00-177-181643890 INTERCHANGEABLE
Pump,rotary
Clayton Manufacturing Company
4720-00-461-1546185935 INTERCHANGEABLE
Hose Assembly,metallic
Hyspan Precision Products, Inc.
6625-00-992-253218781 INTERCHANGEABLE
Stop Assembly
Telephonics Corp/prd Instruments
5950-01-021-696718-78-1 INTERCHANGEABLE
Reactor
General Dynamics Ots (aerospace), Inc. Dba General Dynamics Ordinance and Tactical Systems Div Seattle Operations
5315-01-049-3921 INTERCHANGEABLE
Pin
6125-01-096-949518781 INTERCHANGEABLE
Cover,motor-Generator
Kurz & Root Generator Company, Llc
5998-01-501-5912 INTERCHANGEABLE
Circuit Card Assembly
6515-01-588-3083TICS.23.10314 INTERCHANGEABLE
Concentrator,oxygen
Tribalco Llc
Cross-Reference Index
Part NumberManufacturer
WC19605-16-8 Howmet Global Fastening Systems Inc. Div Microdot Products (USA)
18781 Granco Industries Inc (USA)
21C2404P018 PRIMARY General Electric Company (USA)
WC19605-16-8 PRIMARY Howmet Global Fastening Systems Inc (USA)
18781 Wta Tool Llc (USA)
Related Parts
4320-00-177-1816INTERCHANGEABLE
PUMP,ROTARY
43890
4720-00-461-1546INTERCHANGEABLE
HOSE ASSEMBLY,METALLIC
185935
6625-00-992-2532INTERCHANGEABLE
STOP ASSEMBLY
18781
5950-01-021-6967INTERCHANGEABLE
REACTOR
18-78-1
5315-01-049-3921INTERCHANGEABLE
PIN
6125-01-096-9495INTERCHANGEABLE
COVER,MOTOR-GENERATOR
18781
5998-01-501-5912INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
6515-01-588-3083INTERCHANGEABLE
CONCENTRATOR,OXYGEN
TICS.23.10314

Frequently Asked Questions

What is NSN 5120-00-953-3410?

NSN 5120-00-953-3410 is a Crowfoot Attachment,socket Wrenc, manufactured by General Electric Company, classified under FSC 5120 (No Item Name Available). Status: active.

What are the part numbers for NSN 5120-00-953-3410?

NSN 5120-00-953-3410 has 5 cross-referenced part numbers: WC19605-16-8 (Howmet Global Fastening Systems Inc. Div Microdot Products), 18781 (Granco Industries Inc), 21C2404P018 (General Electric Company), WC19605-16-8 (Howmet Global Fastening Systems Inc), 18781 (Wta Tool Llc).

What NSN replaces 5120-00-953-3410?

There are 8 known substitutes for 5120-00-953-3410: 4320-00-177-1816, 4720-00-461-1546, 6625-00-992-2532 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21C2404P018?

Key specifications for 21C2404P018: Overall Width: 0.777 INCHES MAXIMUM IN; Material: STEEL COMP 4340 OVERALL; Special Markings: 1/2 IN. SIZE IN; Wrenching Surface Size: 0.500 INCHES NOMINAL SINGLE END IN. 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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