M6 x 40mm Socket Cap Head Screws (DIN 912) - High Tensile 12.9 Zinc Plated Metric Socket Cap Head Screws are a widely used machine screw, which feature an internal socket drive, and are fastened with a Hexagonal\/Allen key. Due to this, they are very versatile and easily accessible as the internal drive allows for a smaller head diameter than seen on other machine screws. These Socket Cap Head Screws are made from High Tensile Steel, and coated in a Bright Zinc Plating which provides a level of corrosion and oxidation resistance. For larger quantities or items not listed, please email and one of our team will provide you with a quotation. M6 x 40mm Socket Cap Head Screws (DIN 912) - High Tensile Steel 12.9 Zinc Plated