The M12X40/D912-A4 is a type of stainless steel screw manufactured by Kraftberg. It has a diameter of 12 millimeters and a thread length of 40 millimeters. It has a tensile strength of up to 660 N/mm², a Rockwell hardness of 50-58 HRC, and a corrosion resistance of Grade A3, which makes it suitable for applications in salt water and chlorine environments. It has a TRILOBULAR profile, which ensures an easy and secure fastening, as well as an anti-corrosion coating for prevention against rust. The M12X40/D912-A4 is suitable for a wide range of materials, including wood, plastic, metal, and rubber.