1/2"-20 x 1/2" Steel Fine Thread Hex Socket Headless Set ScrewsType: Set Screws
Head Style: Headless (Hex)
Thread Size: 20 (Fine)
Thread Length: Full
Type: Set Screw
A set screw is a type of screw generally used to secure an object within or against another object, normally not using a nut. The most common examples are securing a pulley or gear to a shaft.