Stainless steel flat washers, also known as plain washers, are thin ring-shaped fasteners with a central hole. They are placed between the nut/bolt head and the workpiece surface to distribute clamping pressure.
Made of 304 or 316 stainless steel, flat washers feature excellent rust and corrosion resistance. By spreading the tightening force over a larger area, they prevent surface indentation and damage to soft materials. They also compensate for oversized mounting holes. Widely used in machinery, construction, pipeline and outdoor fastening projects, compatible with various bolts and nuts.