The Fabco 688C-0299001 (also listed as 688C0299001) is a genuine OEM 1-1/4-12 locknut used in Fabco transfer case and heavy-duty drivetrain assemblies. The 1-1/4-12 designation identifies a 1-1/4 inch diameter, 12-threads-per-inch fine-thread fastener, a spec commonly found in high-load rotating or torque-critical assemblies where standard nuts are prone to loosening. Sourced directly, this locknut is sold by Pro Gear and Transmission. Not sure this is the correct fastener for your application? Give us a call to confirm proper fit.
Features
Genuine OEM Fabco part number 688C-0299001 or 688C0299001
1-1/4 inch diameter, 12-threads-per-inch fine-thread locknut
Designed for torque-critical or high-load fastener positions in Fabco drivetrain assemblies
Sourced as genuine OEM
