Carry-On Trailer Lug Nuts are used on standard hubs and will fit most 2,000 lb., 3,500 lb. and 5,200 lb. idler and brake drum hubs. The lug nuts are constructed from steel to help ensure long-lasting use. The Carry-On Trailer lug nuts have 1/2 inch x 20 threads per inch and fit with 13/16 in. wrenches. Each pack includes five lug nuts. Carry-On Trailer is the largest trailer manufacturer in the world offering a broad line of replacement parts for light and medium duty trailers. We are American owned and American built with award winning customer service. Our replacements parts are OEM replacements for Carry-On trailers and fit most other utility and cargo trailers rated at 2,990 lb. Gross Vehicle Weight Rating and below.