Belleville washers are a type of spring washer that has a conical shape. They are designed to provide a high load capacity in a compact space, making them ideal for applications where traditional flat washers may not fit. Their unique shape allows them to maintain tension and absorb shock, which helps prevent loosening of fasteners over time. These washers are commonly used in various industries, including automotive, aerospace, and manufacturing. They can be found in applications such as bolted joints, valve assemblies, and electrical connectors, where reliable performance and durability are essential.