Sioux Chief 515 series clevis hangers shall be used where necessary to suspend piping overhead using a 3/8 inch threaded rod and in accordance with national code requirements on light commercial applications. Hanger shall comply with MSS-SP58 Type 1 and WWH-171E Type 12.For use with 3/8 all-thread rod,For suspension of light loads, pipe or conduit,Durable material