Fasten metal to metal, metal to wood or metal to other types of materials with these Precision machine screws. The durable steel screws have a zinc coating for smooth performance and rust resistance. Easy to install with a square driver, the screws feature a flat head that delivers great hold and a flush finish. They have an imperial machine thread and are designed to be used in a pre-tapped hole and in projects where secure clamping or disassembly may be required. Machine nut not included.