Heavy-Duty Trailer Hub & Axle Hardware

Secure your trailer hub with confidence using this 1″–14 Castle Spindle Nut with 6 castellations, designed for reliable locking and precise fit on standard trailer spindles. The 6-slot design provides strong engagement with cotter pins, helping prevent loosening from vibration and road movement.

Built from high-strength, corrosion-resistant steel, this spindle nut is engineered for durability and consistent performance in demanding towing conditions.