Our range of socket screws is available in the following threadforms. Metric coarse & fine pitch Unified coarse & fine pitch Imperial coarse & fine pitch Material grades available:- Caphead screws. Steel Grd 12.9 Csk.head screws. Grd 10.9 Button head. Grd 10.9 Socket setscrews Grd 14.9 Also available in Stainless Steel grades A2 & A4, aluminium alloy grade AZ5GU-7075. A choice of plated finishes are available. Socket screw can be modified to your requirements.