Published on March 15, 2019. Hammer On Flange Clamps. Push in conduit hanger with hammer on beam clamp, top mount, for 1 in emt and 9/16 3/4 in, hammer on beam clamp assembly for 9/16 to 3/4 in beam flange thickness spring steel hammer on. 5/16 in to 1/2 in flange thickness and 1/4 20 with 1/4 in stud thread hammer on beam clamp. Travel Roach.