A socket cap screw is a type of cap screw with a hexagonal recessed drive.#8-32 Socket Head Cap Screw, Plain Steel, 3/8 in Length, 10 PK Socket screws are commonly used in assemblies that do not provide sufficient clearance for a conventional wrench or socket..
.Self-Drilling Screw, #10 x 2 in, Zinc Plated Steel Hex Head Hex Drive, 25 PK A self-drilling screw, or tek screw, is similar to a sheet metal screw, but it has a drill-shaped point to cut through the substrate to eliminate the need for drilling a pilot hole.