The M3 x 5W6 JIS B1188 Phil Pan Split Washer Flat Washer Sems M/S Zinc Yellow is a type of washer that is used to distribute the load of a screw or bolt. It is made of metal and has a split washer design that helps to prevent the fastener from loosening. The washer is zinc plated for corrosion resistance and has a yellow finish. It is commonly used in automotive, construction, and other industrial applications.