Socket Cap Screws are bolts or machine screws with an Internal Hex or Allen drive style. Driven with metric sized hex allen keys Type of cap screw with a cylindrical head and hexagonal drive hole A2 Stainless Steel offer the Fastener Industry standard for corrosion and rust resistance. Recommended for use in exterior or fresh water applications. The term socket head cap screw typically refers to a type of threaded fastener whose head diameter is nominally 1.5 times or more that of the screw shank (major) diameter. Socket Head Screws A2 Stainless Steel - 6M x 1.0 x 20M (FT) Qty-100