The M5 x 35W10 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 has a diameter of 5mm and a thickness of 1mm. It is designed to be used with screws or bolts that have a diameter of 5mm.