The washer is a machine component that is used in conjunction with a screw fastener such as a bolt and nut and that usually serves either to keep the screw from loosening or to distribute the load from the nut or bolt head over a larger area.
BS EN 28738 is identical to ISO 8738. BS EN 28738 specifies the characteristics of plain washers for clevis pins according to ISO 2340 and ISO 2341. BS EN 28738 includes nominal sizes from 3 mm up to and including 100 mm as well as specifications with reference to international standards and gives an example for the designation. Plain washers in accordance with this BS EN 28738 shall be used on the cotter pin ends only.
BS EN 28738 on plain washers for clevis pins is useful for:
The purpose of most washers is to evenly distribute the load of the threaded fastener with which they are used. washers protect the surface from damage during installation. They distribute the pressure and prevent the fastener from moving or corroding. Skipping on washers can dramatically reduce the lifespan of how your product is put together.
BS EN 28738 provides you with dimension specifications related to hole diameter, outside diameter, and thickness of plain washers that you need to adhere to. Following the guidelines given in BS EN 28738 helps you to design effective plain washers.
Following the specifications provided in BS EN 28738, lets you manufacture and supply high-quality plain washers to your customers. These customers will be able to safely use the washers.
ISO 8738:1986