The M4-0.7 x 6W9 JIS B1188 Phil Pan 304SS Split Washer 302/304SS Flat Washer Sems A2 Stainless is a high-quality washer that is designed to be used with a variety of applications. It is made from 304 stainless steel, which is known for its durability and corrosion resistance. The washer has a split design, which allows it to be easily installed and removed. It also has a flat design, which helps to distribute the load evenly. The washer is available in a variety of sizes, so it can be used with a variety of applications.