PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

20550Crowfoot Attachment,socket Wrenc

Apex Tool Group, Llc Dba Nicholson · NSN 5120-01-430-8107 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-01-430-8107 — this item is cataloged by the U.S. Government under National Stock Number 5120-01-430-8107. Primary manufacturer part number: 20550.
Features
  • Crowfoot Attachment,socket Wrenc — FSC 5120
  • Drive End Shape: SQUARE SINGLE END INTERNAL
  • Wrenching Surface Shape: OVAL SINGLE END INTERNAL
  • Surface Treatment: CHROMIUM OVERALL
  • Material: STEEL OVERALL
  • Drive Surface Size: 0.375 INCHES NOMINAL SINGLE END IN
  • Style Designator: OPEN END
  • Wrenching Surface Size: 0.375 INCHES NOMINAL SINGLE END IN
Applications
  • Applications requiring Steel Overall construction
General Description

The Crowfoot Attachment,socket Wrenc, cataloged under National Stock Number 5120-01-430-8107, is classified within Federal Supply Class 5120 (No Item Name Available) of the Hand Tools group. The primary manufacturer of record is Apex Tool Group, Llc Dba Nicholson. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5120-01-430-8107
Primary Part Number20550
Item NameCrowfoot Attachment,socket Wrenc
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerApex Tool Group, Llc Dba Nicholson
StatusACTIVE
Drive End ShapeSQUARE SINGLE END INTERNAL
Wrenching Surface ShapeOVAL SINGLE END INTERNAL
Surface TreatmentCHROMIUM OVERALL
MaterialSTEEL OVERALL
Drive Surface Size0.375 INCHES NOMINAL SINGLE END IN
Style DesignatorOPEN END
Wrenching Surface Size0.375 INCHES NOMINAL SINGLE END IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 11
1680-00-074-194920550 INTERCHANGEABLE
Shaft Assembly,flexible
Transdigm Inc
2920-00-118-55331287375H91 INTERCHANGEABLE
Generator,engine Accessory
Dressta North America Ltd
5365-00-386-456725870 INTERCHANGEABLE
Bushing,oil Pressure
Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp.
7310-00-474-589320551 INTERCHANGEABLE
Compartment Vent,steam Cooker
Cleveland Range, Llc
5999-00-549-5570569-021-010-000 INTERCHANGEABLE
Contact,electrical
Roanwell, Llc
6685-00-696-241820550 INTERCHANGEABLE
Thermometer,self-Indicating
H-B Instrument Co
5985-00-719-9944MX-2400/ARM-35 INTERCHANGEABLE
Tuner,transmission Line
Joint Electronics Type Designation System
6130-00-986-823320550 INTERCHANGEABLE
Power Supply
Senior Operations Llc Div Senior Aerospace Ketema
4820-01-311-1623CPC10-15-1 INTERCHANGEABLE
Valve,check
Parker-Hannifin Corporation Dba Pneutronics Div Quick Coupler Division
5331-01-340-685520550 INTERCHANGEABLE
O-Ring
Allied Systems Company Dba Allied Systems Co
Cross-Reference Index
Part NumberManufacturer
20550 Apex Tool Group, Llc Dba Nicholson (USA)
20550 Easco Hand Tools Inc Dba Danaher Tool Group Div Danaher Tool Group Easco Hand Tools Inc. (USA)
20550 Easco Hand Tools Inc (USA)
Related Parts
1680-00-074-1949INTERCHANGEABLE
SHAFT ASSEMBLY,FLEXIBLE
20550
2920-00-118-5533INTERCHANGEABLE
GENERATOR,ENGINE ACCESSORY
1287375H91
5365-00-386-4567INTERCHANGEABLE
BUSHING,OIL PRESSURE
25870
7310-00-474-5893INTERCHANGEABLE
COMPARTMENT VENT,STEAM COOKER
20551
5999-00-549-5570INTERCHANGEABLE
CONTACT,ELECTRICAL
569-021-010-000
6685-00-696-2418INTERCHANGEABLE
THERMOMETER,SELF-INDICATING
20550
5985-00-719-9944INTERCHANGEABLE
TUNER,TRANSMISSION LINE
MX-2400/ARM-35
6130-00-986-8233INTERCHANGEABLE
POWER SUPPLY
20550
4820-01-311-1623INTERCHANGEABLE
VALVE,CHECK
CPC10-15-1
5331-01-340-6855INTERCHANGEABLE
O-RING
20550
5310-01-353-2674INTERCHANGEABLE
WASHER,BEVEL

Frequently Asked Questions

What is NSN 5120-01-430-8107?

NSN 5120-01-430-8107 is a Crowfoot Attachment,socket Wrenc, manufactured by Apex Tool Group, Llc Dba Nicholson, classified under FSC 5120 (No Item Name Available). Status: active.

What are the part numbers for NSN 5120-01-430-8107?

NSN 5120-01-430-8107 has 3 cross-referenced part numbers: 20550 (Apex Tool Group, Llc Dba Nicholson), 20550 (Easco Hand Tools Inc Dba Danaher Tool Group Div Danaher Tool Group Easco Hand Tools Inc.), 20550 (Easco Hand Tools Inc).

What NSN replaces 5120-01-430-8107?

There are 11 known substitutes for 5120-01-430-8107: 1680-00-074-1949, 2920-00-118-5533, 5365-00-386-4567 and 8 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 20550?

Key specifications for 20550: Drive End Shape: SQUARE SINGLE END INTERNAL; Wrenching Surface Shape: OVAL SINGLE END INTERNAL; Surface Treatment: CHROMIUM OVERALL; Material: STEEL OVERALL. 8 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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