The 3341-1S is a jack socket screw kit designed for the secure mounting of I/O connectors. This kit is constructed from steel with a zinc and clear chromate finish for corrosion resistance. It includes two jack sockets, eight spacers, two lock washers, and two nuts, all featuring a #4-40 thread size. The recommended maximum installation torque is 7.0 inch-lbf. This hardware is primarily used for the rear-panel mounting of D-Sub connectors on panels with a thickness of 1/8 inch or 3/32 inch.