Trailer hardware including U-bolts, shackle plates, fish plates, castle nuts, axle washers and split pins, in stock at West Coast Trailer Parts in Midland. These are the fixings and suspension components that keep trailers on the road, in galvanised and zinc finishes. Sizes vary by axle and spring, so check the dimensions in each listing or call (08) 9274 2429 and we will help you match them up. Castle nuts pair with our bearings, seals and grease caps.