The M3X40/D965-A4 is a type of fastening screw manufactured by Kraftberg. It is threaded and features a hex head, making it easy to grip with a wrench. The screw is also made of high-quality steel, making it resistant to corrosion and wear. Additionally, the M3X40/D965-A4 has a unique knurled textured tip, which keeps it from slipping or turning in materials like wood, plastic, and metal when tightening. Its length is 40 millimeters (1.6 inches) and a thread diameter of 9.65 millimeters (0.38 inches). It is a popular choice for a variety of projects, such as cabinetry, carpentry, automotive repair, and furniture-making.