#4-40 x 5/16 18-8 Stainless Hex Socket Headless Set Screws SSSSS-059 (20 pcs.)

Diameter: #4 Length: 5/16 Material: Stainless Steel Head Style: Headless (Hex) Thread Size: 40 (Coarse) Thread Length: Full Hardness: 18-8 Style: Socket Type: Set Screw Box of 20. 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.