What distinguishes fender washers from standard washers?

• A. They have a thicker perimeter to withstand more pressure
• B. They have an extremely large amount of additional surface area
• C. They are specifically made for masonry screws
• D. They feature an internal thread to fit on bolts

Answer: (B)

Fender washers are characterized by their unusually large outer diameter, which significantly increases their surface area compared to standard washers. This larger surface area is designed to distribute the load over a wider space, preventing damage to the materials being fastened and providing better stability. By enhancing the load distribution, fender washers are particularly useful in applications involving softer materials, where traditional washers might not provide adequate support and could potentially cause the surface to deform under pressure.

This design feature sets fender washers apart from standard washers, which typically have a much smaller outer diameter proportional to their inner diameter. The other options—focusing on thickness, specific uses for masonry screws, or inclusion of internal threads—do not accurately define what makes fender washers unique. While other washers serve specific functions, the primary distinguishing feature of fender washers remains their large surface area, allowing for improved load distribution.