Tie Down Galvanized Trailer U-BoltTie Down trailer U-bolts are used for mounting brackets to the trailer frame. The hot dipped galvanized coating helps prevent rust build up over time. Includes flat washers and nyloc nuts; Made in the USA; Sold individually; Specifications: Part # Shape Rod Width - Threads per Inch Length Between Leg Leg Length Thread Length 86223 Square 1/2" - 13 2-1/16" 4-13/16" 2" 86225 Round 1/2" - 13 2-3/8" 5-3/8" 2" 86222 Square 1/2" - 13 3-1/16" 3-13/16" 1-1/2"