SMLease Design

Mechanical Product Design & Development Partner

Blog posts : "Fasteners"

Types Of Washers & Their Application

Washer is a disk shaped thin plate with a centre hole used to distribute the load of a threaded fastener. Washers are also used as spacer, spring, for distributing load, pre-loading screws, to reduce vibration (rubber washer). Washers are made of metal, plastic, rubber or fiber.

Washers can be categorised in three types : Plain Washer, Spring Washer, Lock Washer

Plain Washer

Plain Washer are used to distribute load to prevent damage to the surface being assembled. Plain (Millar) washers are also used to provide electrical insulation.

Flat washer / Type A plain washer 

Flat Washer / Plain Washer are thin, flat, and circular washers used with screw, nut or a bolt to distribute load to relatively larger area.

Flat washers sometimes also used to secure a rel…

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