[3 8X20 10pcs]

A butterfly bolt (butterfly bolt) is a butterfly head that can be tightened or loosened by hand without any tools. According to the shape of the head, it can be classified as 1 to 3 different types. The screws are coarse threads. It is stronger than resin thumbscrews, so it may be better to choose a butterfly bolt depending on the environment and situation you use. For example, it is used to adjust two pipes, such as the working part, the frame part and other areas that are stronger than it appears. Also known as wing bolt