M8 x 12 mm Serrated Flanged Hexagon Bolts (DIN 6921) - A2 Stainless Steel Hexagon Bolts 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 to this screw making them ideal in heavy duty applications. Hexagon Bolts are partially threaded and have a section of plain unthreaded shaft below their head, whereas Hexagon Setscrews have a fully threaded shaft. The additional slanted serrations on the flange of this Hexagon Bolt, grip into the fastened surface to help prevent it from loosening. These Serrated Flanged Hexagon Bolts 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. M8 x 12mm Serrated Flanged Hexagon Bolts (DIN 6921) - A2 Stainless Steel