M4 x 30mm Hexagon Setscrews (DIN 933) - A2 Stainless Steel Hexagon Setscrews are very versatile screws, which are tightened and loosened with a spanner matching the head diameter (across the flats). Their Hexagonal Head allows for a great amount of torque to be applied, making them ideal in heavy duty applications. Hexagon Setscrews, have a fully threaded shaft, right up to the head, whereas Hexagon Bolts are only partially threaded. The full thread allows them to be used in a multitude of situations without fear of running out of thread. These Hexagon Setscrews are made from A2 Stainless Steel which provides corrosion and oxidation resistance. For larger quantities or items not listed, please email and one of our team will provide you with a quotation. M4 x 30mm Hexagon Setscrews (DIN 933) - A2 Stainless Steel