Stainless steel u-bolts are used to run and support conduit or pipe in electrical systems. Gibson Stainless offers u-bolts for both rigid conduit and mechanical applications (figure 137 style u-bolts).Figure 137 style u-bolts are sold complete with one nut on each leg.Material: 316 SSStandards: ASTM A193 B8M Class 1, ASTM F593U-bolt manufactured in USA; hex nuts and raw material for u-bolt may or may not be of U.S. origin.