A washer characterized by its notably increased outer diameter relative to the inner hole is frequently employed in applications requiring a broad distribution of load. This feature allows it to cover larger holes or provide support across a wider surface area than standard washers. For example, when attaching sheet metal to a frame, a large outer diameter helps prevent the fastener from pulling through the relatively thin material.
The significance of this type of washer lies in its ability to prevent material deformation and increase the lifespan of connections subjected to stress or vibration. Its historical use can be traced back to applications where minimizing stress concentration around fasteners was critical, improving the structural integrity of assemblies. Benefits include enhanced resistance to pull-through, increased joint durability, and protection of the fastened material’s surface.