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Belleville Spring Washer

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Belleville Spring Washer

Belleville Spring Washers, also known as Butterfly washers, are specialized fasteners designed to distribute loads and provide a stable, secure fit in a wide range of applications. Characterized by their distinctive shape, butterfly washers feature a central hole with two extended "wings" or flanges on either side. These wings create a larger surface area that helps to evenly distribute the pressure exerted by a fastener, reducing the risk of damage to the surface being fastened. The primary function of butterfly washers is to prevent loosening of bolts, screws, and other fasteners, especially in applications subject to vibration or dynamic loads. By spreading the load over a larger area, they help to minimize the potential for material deformation, wear, or failure. This makes them particularly valuable in industries such as automotive, aerospace, machinery, and construction, where reliability and stability are crucial. Butterfly washers are commonly made from various materials including stainless steel, carbon steel, aluminum, and plastic, depending on the specific requirements of the application. Stainless steel versions are highly resistant to corrosion and are often used in outdoor or marine environments, while plastic variants might be chosen for lightweight or non-corrosive applications. In addition to their practical uses, butterfly washers also play a role in maintaining aesthetic integrity, as their design can contribute to a cleaner, more polished appearance of the assembled components. Available in numerous sizes and specifications, butterfly washers can be tailored to meet the needs of different projects, ensuring both functionality and visual appeal.

About Us
Anhui Ningguo Dongbo Fastener Co., Ltd.
Dongbo was established in September 2005 with a registered capital of 47.72 million. It is located in the national Ningguo Economic and Technological Development Zone, covers an area of ​​91 acres, and currently has more than 530 employees. The company has been focusing on the production of retaining rings for 46 years, producing washers (round, butterfly, spherical), retaining rings, elastic cylindrical pins and other series of products and non-standard customized stamping parts. It is a high-tech enterprise with large scale, multiple varieties, complete specifications, and integrated manufacturing, R&D and sales in the industry.
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