Commonly used with flat or lockwashers.
#12-24 x 1/2 in Phillips Flat Machine Screw, Plain Stainless Steel, 20 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.. A machine screw, also called a stove bolt, is generally a smaller fastener threaded the entire length of its shank.