Nand Kishore Hemant Kumar

The bolt consists of a head and a cylindrical body with screw threads along a portion of its length. The nut is the female member of the pair, having internal threads to match those of the bolt. Washers are often used to prevent loosening and crushing.

They prevent nuts or bolts from wearing down on the joining surface by evenly distributing the load between the mechanical object like a metal sheet of wood. Other uses of fender washers are: They prevent corrosion between a mechanical part, for example, an aluminum surface and a steel screw

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