Conical washers, sometimes called Belleville washers,ideal for heavy bolted connections where the fasteners loosen due to vibration or heat shrinkage/expansion. The stainless steel conical washer is designed to support moderately high loads with relatively small deflection. The load-deflection characteristics depend on the ratio of height to thickness. Unsure which fastener is best for your job? Call us at 86-573-82869272 or Contact Us and one of our trained technicians will help you find the right fasteners for your application.