1/2"-20 x 4" Black Oxide Steel Fine Thread Socket Cap Screws

Diameter: 1/2"
Length: 4"
Material: Steel
Finish: Black Oxide
Head Style: Socket (3/8" Socket)
Thread Size: 20 (Fine)
Type: Socket Cap Screw

Box of 2.

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.