The M6X12/D933-A4 is a part of the Kraftberg fastening system. It is a hex head, flanged self-tapping screw comprised of alloy steel, with a black oxide finish. The screw is 12 millimeters in length and has an M6 size, meaning that the screw has a 6 millimeter diameter. The D933-A4 indicates that it has a Class 10.9 hardness, is of low crown design, and is made to JIS B1180 specifications. This screw is ideal for many applications, including fastening wooden members, steel frames, and plastic assemblies.