Unraveling the Myths of the Fastener World

Ten commonly found statements and beliefs regarding threaded fasteners are examined against appropriate data. They are all false and misleading. The author presents them in an order and manner which should lead to an understanding of what makes bolted joints work or fail. From “vibration” loosening to “lock” washers the facts associated with the fables are presented as assisting in the achievement of fastener objectives:

1. 1)
   Development of predictable clamp load
2. 2)
   Prevention of self loosening
3. 3)
   Maintenance of the ability to disassemble the joint by avoiding corrosion and galling.