5/16"-18 x 1-1/2" Plain Button Head Socket Cap Screws SCBS-047 (8 pcs.)
Head Style: Button (3/16" Socket)
Thread Size: 18 (Coarse)
Type: Socket Cap Screw
Box of 8.
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.