Why use washers?

Approximately 50% of the torque applied when tightening a bolt is absorbed by under-head friction where the mating surfaces of a nut and flange are being forced together. This makes the interface between the nut and the flange a crucial bearing surface and means that washers play a vital role in accurate tightening of bolted joints.

Achieving the correct design tension on installation and for the long-term integrity of your bolted joints is the result of a combination of factors, but the importance of using the correct washers should not be overlooked. Read our article on this subject or ask your fastener supplier to advise on the particular type of washer to use for any specific application.

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