This zinc-plated square trailer U-bolt only measures 1/2 inch by 3 inches by 4 11/16 inches. This U-bolt can be used for a large variety of purposes on boat trailers, utility trailers, and other purposes. You might see this bolt used to mount components onto 3" wide tubing, or it can be used diagonally to clamp together components with the use of a U-bolt shackle. The zinc-plated finish is more resistant to rust than a standard raw steel fastener, so it is perfect for utility trailers and freshwater boat or jet ski trailers. If you order from this listing you will receive ONLY the U-bolt, no nuts, washers, lock washers, or other hardware will be included.