Machine Screw
Machine screws are threaded fasteners designed to be used with a pre tapped hole or a nut, rather than forming their own threads in the material. They have uniform, precise threads and are commonly used in metal assemblies, equipment enclosures, electronics, and machinery where consistent fit and repeatable tightening are important. Machine screws are made in both inch and metric sizes and are specified by diameter, thread pitch or threads per inch, and length.
Machine screws come in many head styles and drives, such as pan, flat, button, or socket heads, and Phillips, slotted, Torx, or hex drives. Selecting the right machine screw involves matching the correct thread size and pitch to the mating threads, choosing an appropriate strength and material for the load and environment, and using the right length to achieve adequate thread engagement. Proper installation helps prevent stripping and cross threading and ensures the joint develops the intended clamp load.