Zinc Plated U-Bolts for 4” pipes work great for attaching parts to poles, signs, beams, or walls. This U-Bolt has a width of 4-9/16" and is designed to fit around 4" ID piping which has an OD of 4-9/16" but is versatile enough for many other projects. The 4” U-Bolts support heavy objects and often times work better than routing clamps depending on the application. Our high quality round u-bolts are domestic products that are proudly made here in the USA. Zinc U-Shaped Bolts Hook around piping or cables and should be used with the correct size Zinc Hex Nuts and Zinc Washers.