Tie Down Zinc Plated Trailer U-Bolts 1/2" (Pair)Tie Down trailer U-bolts are used for mounting brackets to the trailer frame. These U-bolts are zinc plated to help prevent rusting. Includes flat washers and nyloc nuts; Made in the USA; Sold in pairs; Specifications: Part # Shape Rod Width - Threads per Inch Length Between Leg Leg Length Thread Length 86204 Square 1/2" - 13 2-1/8" 4" 2" 86205 Square 1/2" - 13 3-1/8" 3" 1-1/2" 86206 Square 1/2" - 13 3-1/8" 4" 2" 86207 Square 1/2" - 13 4-1/8" 3" 2"