This flat washer sits between a fastener head and the mating surface on a baler or press subassembly. It distributes clamp load over a larger area than the fastener alone would provide, preventing local deformation of the mounting face. A missing or undersized washer can allow the fastener to loosen under vibration, leading to misalignment of the driven components. The washer is dimensioned to match the original assembly’s clearance hole and bolt seat, so no substitution or shimming is needed during installation.