Mallable Iron Universal Beam Clamp 1/4"-20 - Zinc Plated Universal Beam Clamp with threaded hole.Mallable Iron Universal Beam Clamp 1/4�-20 features include: Universal beam clamp has a maximum flange thickness of 5/8 The threaded hole on the back side of the clamp is not load rated Zinc Electro-Plate finish Order Qty of 1 = 1 Piece Below is more info on our Mallable Iron Universal Beam Clamp 1/4"-20