U-Bolt, Low Carbon Steel Material, Zinc Plated Finish, 1-5/8 In. Length, 3-1/2 X 4-1/2 In. Size, Internal-3-1/2 In. Diameter, NC Rolled Machine Thread, 2 Nuts, Hex Nut Type, 1-5/8 In. Thread Length, 4-1/2 In. Height, 3/16 In. Pipe Diameter, 3/8 In. Thread Diameter