C.E. Smith Spindle Nut Kit

The C.E. Smith Spindle Nut Kit (Part #11065A) is a complete replacement fastener assembly designed for boat trailer axles with 1-inch shaft diameter. This kit addresses a critical wear point on boat trailers—the spindle nuts that secure the wheel hub to the axle—where vibration, corrosion, and repetitive stress gradually loosen fasteners over time. Replacing spindle nuts before failure prevents wheel separation during towing and is essential maintenance for safe offshore and freshwater trailer operation.

This kit contains everything needed for a complete spindle assembly replacement: two 1-inch shaft spindle nuts, two corresponding washers, and two 1-3/4-inch cotter pins that lock the nuts in place. The washers distribute load across the hub bearing surface and prevent the nut from tightening directly against the bearing race, which would cause premature wear. Cotter pins provide mechanical lock-up so vibration cannot work the nut loose during extended highway or rough-water towing. C.E. Smith engineered this as a matched set, ensuring all components are correctly sized and metallurgically compatible.

Boat trailer owners should replace spindle nuts annually or whenever they service wheel bearings—especially those launching in saltwater environments where corrosion accelerates fastener degradation. This kit is equally applicable to freshwater and saltwater trailers, recreational and commercial operations, and both bunk and roller-style trailers that use 1-inch axle shafts. The kit sells as a pair, so a single purchase covers both sides of the axle.

C.E. Smith has manufactured trailer hardware and marine components for decades and maintains tight tolerances on spindle fasteners to ensure fit and lock-up integrity. If your trailer uses a 1-inch spindle shaft, verify your current fastener size against this kit before purchase to confirm compatibility with your axle configuration.