#4-40 x 5/16" Hex Socket Headless Set Screws SSSS-167 (25 pcs.)

Diameter: #4
Length: 5/16"
Material: Steel
Head Style: Headless (Hex)
Thread Size: 40 (Coarse)
Thread Length: Full
Style: Socket
Type: Set Screw

Box of 25.

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.