These Trailer U Bolts come in a 4 pack and include all the associated hardware, which is 2 Hex Nuts, 2 Lock Washers and 2 Flat Washers for each U Bolt. The U Bolts and Hardware are all constructed of Stainless Steel, which means they have the highest level of corrosion protection, making them great for use on Land Trailers as well as fresh or saltwater boat trailers.