The M3 x 10W6 JIS B1188 Phil Pan Split Washer Flat Washer Sems M/S Zinc is a type of washer that is used to distribute the load of a screw or bolt over a larger surface area. It is made of zinc-plated steel and has a split washer design that helps to prevent the screw or bolt from loosening. The washer is 10mm in diameter and 6mm thick, and it is suitable for use with M3 screws or bolts.