03 March 2021
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Boker’s guide to clipped washers

Washer manufacturer Boker’s is promoting stamped clipped washers, recommended for design engineers who have limited space and need to control axial motion within their applications.

Clipped washers have a flat edge on either the outside diameter (OD), inside diameter (ID) or both. This flat edge helps prevent the washer from rotating in applications, especially when space is limited and component performance is critical. Applications include automotive, marine, aerospace and medical.

“Clipped washers, also referred to as D-washers, are generally used in applications where space limitations do not allow the use of a flat round washer, as well as when keeping an assembly stationary is required,” said Chuck Kersey, assistant sales manager. “Clipped washers can be used with shafts, rods or mating parts that are shaped like a ‘D’”.

The functionality of the clipped washers come from providing a flat bearing surface within assemblies. They are generally used under the head of a bolt and/or a nut to disperse loads as well as to prevent the washer from turning in the application. They are mounted with the flat edge of the washer facing a flat surface or recessed hole to prevent rotation. Clipped washers are available in steel, stainless steel, aluminium and other stock metallic and non-metallic materials to meet specific applications needs.

Design engineers can choose from a wide variety of sizes, thicknesses and materials, including non-metallic to suit their applications.

Boker's clipped washers are custom produced in short, medium and long runs. Additionally, the manufacturer maintains over 32,000 stock tools for flat round washers, spacers and shims.

Outside diameters range from 0.080-inch to 5.140-inch and inside diameters vary.


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