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How Do I Keep My Bolts Tight? [Solved]
Nylon or metal inserts inside a nut (sometimes called a “lock nut”) can add extra friction to prevent loosening. A related idea is to fit a spring inside the nut, which firmly grasps the bolt threads and is designed to move in the opposite direction of the nut if vibration or other forces cause it to unwind.
How to keep bolts tight with the HYTORC J-Washer
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How Hard Should You Tighten the Bolt? | Q&A
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Car Bolt Tightening: How Tight Should Bolts Be?
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