The M5-0.8 x 25W10 JIS B1188 Phil Pan 304SS Split Washer 302/304SS Flat Washer Sems A2 Stainless is a high-quality fastener that is perfect for a variety of applications. It is made from durable stainless steel, which makes it resistant to corrosion and rust. The split washer helps to distribute the load evenly, while the flat washer helps to prevent the fastener from loosening. This fastener is easy to install and remove, making it a great choice for both professionals and DIYers.