Description
1/4"-20 x 3" Black Oxide Phillips Pan Head Machine Screws (8 pcs.) Diameter: 1/4" Length: 3" Material: Steel Finish: Black Oxide Head Style: Pan (Phillips) Thread Size: 20 (Coarse) Thread Length: Full Type: Machine Screw Box of 8. A machine screw, also called a stove bolt, is generally a smaller fastener threaded the entire length of its shank. 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. Commonly used with flat or lockwashers.