5/16"-24 Socket Head Cap Screw, Plain Steel, 1 in Length, 10 PK, Midwest Fastener, Mfr#: 67508

A socket cap screw is a type of cap screw with a hexagonal recessed drive. A hex key is required to tighten or loosen a socket screw. Socket screws are commonly used in assemblies that do not provide sufficient clearance for a conventional wrench or socket.