Beam Clamps with Shark tooth design to prevent slippage, for flanges up to 1/2", High-Quality spring steel black finish. Static load up to 100 lb, accepts 3/8-16, 1/4-20 or #10-24 threaded hardware, cUL Listed; 100 piece / inner box. Simply45 Beam clamps are great for hanging bridle rings and threaded rod from steel structural beams. The beam clamp accepts 3/8-16, 1/4-20 or #10-24 threaded hardware. Made of spring steel, with an adjustable jaw to fit on beam flanges up to 1/2" thick. Made with a black corrosion-resistant coating for years of worry-free service.