U-bolts are versatile fasteners used to secure pipes, conduit, cables, and machinery, or as an anchor in foundations and roofs. U Bolts are used heavily in building and construction. The u, or bent, shape of the bolt keeps it firmly in place, adding security and stability to the join. U bolts are used as framing fasteners and anchors for foundations and roofs, pipe and conduit holders and bolts for motor and engine shaft components.