5/16"-18 x 3/8" 18-8 Stainless Hex Socket Headless Set Screws SSSSS-134 (7 pcs.)

Diameter: 5/16"
Length: 3/8"
Material: Stainless Steel
Head Style: Headless (Hex)
Thread Size: 18 (Coarse)
Thread Length: Full
Hardness: 18-8
Style: Socket
Type: Set Screw

Box of 7.

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.