Commonly used with flat or lockwashers.
A machine screw, also called a stove bolt, is generally a smaller fastener threaded the entire length of its shank.#4-40 x 3/16 in Slotted Flat Machine Screw, Plain Brass, 60 PK Machine screws are used in fastening nearly all types of hard materials.. Especially useful in metal-to-metal or where heavy duty fastening is required.