Posi Lock Nut RH Thread

The Posi Lock Nut RH Thread is a precision pinion nut engineered for high-performance quick-change rear differential assemblies. Designed for use in Winters Quick Change systems, this right-hand threaded fastener secures the pinion gear in place while allowing rapid disassembly for gear ratio changes or maintenance. This component is essential for drag racing, circle track, and other motorsports applications where differential setup changes are frequent and reliability is non-negotiable.

Manufactured from aluminum for reduced weight without sacrificing clamping integrity, the Posi Lock Nut features a 1-5/16-20 inch right-hand thread specification that mates precisely with Winters Quick Change pinion shafts. The aluminum construction minimizes rotating mass while maintaining the strength required to lock the pinion assembly under extreme torque loads common in motorsports. The knurled or textured grip surface ensures positive hand-tightening capability, eliminating the need for excessive wrenching and reducing the risk of cross-threading during repeated assembly cycles.

This nut is ideal for racers and performance shops that operate Winters Quick Change differentials in competitive environments. Installation is straightforward—hand-tighten the nut onto the pinion shaft until snug, then verify proper seating before operation. Compatibility is limited to Winters-branded quick-change assemblies with matching 1-5/16-20 pinion shafts. For optimal performance and safety, inspect the nut for wear or damage before each use, and replace if threads show signs of stripping or corrosion.