5/16"-18 x 2-1/4" Black Chrome Smooth Socket Cap Screws (3 pcs.)Type: Black Chrome Socket Cap Screws
Finish: Black Chrome
Head Style: Smooth Socket (1/4" Socket)
Thread Size: 18 (Coarse)
Type: Socket Cap Screw
Box of 3.
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.