Hey DIYers and mechanics! If you're working on projects that need reliable washers, this 5-pack of M20 stainless steel flat washers is exactly what you need. These aren't your average cheap washers - they're made from quality 304 stainless steel with a black zinc plating that really helps prevent rust and corrosion. The dimensions are perfect for M20 bolts - 21mm inner diameter, 37mm outer diameter, and 3mm thick (that's about 0.83x1.46x0.12 inches for those who prefer imperial). What do washers actually do? They spread the load from your bolts or screws over a larger area, which prevents damage to whatever you're fastening and reduces the risk of things coming loose from vibration or stress. These are seriously versatile - great for automotive work, marine applications, electrical connections, household repairs, industrial equipment, you name it. The black zinc finish not only looks professional but adds an extra layer of protection against moisture and chemicals. Having five in the pack means you've got spares for your current project and future jobs too. The quality is noticeable - no rough edges, consistent sizing, and they just feel solid. Whether you're working on your car, building furniture, or doing electrical work, having the right washers makes all the difference in how professional and secure your finished project turns out.