5/16"-18 x 1/2" Chrome Grade 8 Button Head Socket Cap Screws (10 pcs.)Type: Chrome Button Head Socket Cap Screws
Head Style: Button (3/16" Socket)
Thread Size: 18 (Coarse)
Thread Length: Full
Hardness: Grade 8
Type: Socket Cap Screw
Box of 10.
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.