Sirius 12.9 Grade Socket Head Cap Screws UNC 5/16 UNC 1/2" Pack of 200

This variant of the Sirius 12.9 Grade Socket Head Cap Screws is sized at 5/16 UNC diameter x 1/2" length, supplied in a pack of 200. A short, sturdy fastener suited to compact assemblies where a slightly larger diameter than 1/4 UNC is required without a long shank. Features and Benefits: • Grade 12.9 high tensile alloy steel construction • UNC thread for secure, compatible fastening • Internal hex socket head for high torque drive • Compact head profile for use in tight spac