Spring washers are used under nuts to prevent ____.
loosening and fastening of nuts due to vibration
A spring washer is a split helical washer placed under a nut or bolt head.
Its springy action keeps a constant pressure on the nut and increases friction, so the nut does not work loose under vibration or shock.
It is not meant to protect the threads or the bolt from damage.
Hence, loosening and fastening of nuts due to vibration.
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