1/4"-28 x 1/4" 18-8 Stainless Steel Fine Thread Hex Socket Headless Set Screws 24 24PK, Midwest Fastener, Mfr#: 38927

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.