The Eaton Fuller Castle Nut, part number X2-1000 or X21000, is a genuine Eaton manual transmission hardware component. Castle nuts are used in transmission assemblies where a cotter pin or safety wire must lock the fastener in place, preventing loosening under vibration and load. This part falls under Eaton's manual transmission components category and is sold individually. Pro Gear and Transmission carries genuine Eaton Fuller parts for drivetrain repair and maintenance. Call us to confirm proper fit for your specific transmission before ordering.
Interchanges:
- HFX2-1000
Features
Genuine Eaton Fuller manual transmission hardware
Part number X2-1000 or X21000
Castle nut design accepts cotter pin or safety wire for positive fastener retention
Sold as individual unit
Applies to manual transmission component assemblies
