Sirius 12.9 Grade Socket Head Cap Screws UNC

This variant of the Sirius 12.9 Grade Socket Head Cap Screws is sized at 5/16 UNC diameter x 1-1/4" length, supplied in a pack of 200. Suitable for applications requiring additional thread engagement at 5/16 UNC diameter, including thicker panel assemblies and medium-load structural fastenings. 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 spaces • Precision-machined threads for consistent performance Specificatio