5/16"-18 x 1-3/4" Black Oxide Steel Coarse Thread Socket Set Screws

Diameter: 5/16"
Length: 1-3/4"
Material: Steel
Finish: Black Oxide
Driver Type: Hex
Thread Size: 18 (Coarse)
Type: Socket Set Screw

Box of 8.

A socket set screw is the most common set screw, which is tightened or loosened with a hex key.