Tie Down Zinc Plated Trailer U-Bolts 3/8" (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 86208 Square 3/8" - 16 2-1/8" 4" 1-3/4" 86209 Square 3/8" - 16 3-1/8" 3" 1-3/4" 86210 Square 3/8" - 16 3-1/8" 4" 1-3/4"