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. Especially useful in metal-to-metal or where heavy duty fastening is required.#6-32 x 4 in Combination Phillips/Slotted Round Machine Screw, Zinc Plated Steel, 100 PK Machine screws are used in fastening nearly all types of hard materials.