The Item Number For This Product From Prime-Line Is 9072026 U-Bolts,, Pack). U-bolts feature machine threading on both arms and are designed to be inserted into two pre-drilled holes. They are primarily used to anchor cylindrical objects such as pipe, conduit, cable, tubing, round bar or rope. In some applications, U-bolts may be inserted into wet concrete with the threaded arms pointing up. Once the concrete sets around the "U" shaped end, the U-bolt will be firmly anchored into place and the protruding threaded tips can be used to attach objects to the concrete. Diameter-Thread Size: 3/8 inch-16 Inside Width/Compatible Pipe Diameter: 3 inch Used to secure pipe, conduit, cable or other cylindrical objects Requires pre-drilled holes (hole should be the same diameter as the threaded post) Includes u-bolt plate and 2 nuts Thread Type: Coarse, Thread Class: UNC-2A, Point Style: Blunt