4-40 x 5/16" Machine Screw - Binding Undercut Head - Slotted - Steel - Zinc CR+3 - FT - UNC - 100 Pk

B4-40 x 5/16" Machine Screw - Binding Undercut Head - Slotted - Steel - Zinc CR+3 - FT - UNC - 100 Pk

Machine Screws are designed to go through a hole or nut that is pre-tapped to form a mating thread for that screw. Binding head screws are the preferred design for making a firm electrical connection.