7/16"-20 Socket Head Cap Screw, Chrome Plated Steel, 1-1/2 in Length, 5 PK, Midwest Fastener, Mfr#: 79804

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.