Stainless steel conduit hangers are designed to be used in conjunction with threaded rod, beam clamps, etc. to suspend rigid (heavywall) conduit from I-beams, flanges, etc.Gibson Stainless sells the conduit hangers complete with Type 316 SS bolt and Type 316 SS nut.-Sizes 1/2" - 2" supplied with machine screw, nut-Sizes 2-1/2", 3" and 4" supplied with carriage bolt, nutMaterial: 316 SSStandards: ASTM A240, ASTM F593Compliances: UL Listed for Canada and US (Standard 2239)UL File Number DWMU.E506522Canada UL File Number DWMU7.E506522Body 100% made in USA; bolt and hex nut may or may not be of U.S. origin.