Engineering:Palnut

A Palnut® Fastener is a variation of the lock nut device for bolts which are intended to fasten securely without welding or any other permanent fastening. The Palnut is a registered trademark of Tinnerman Palnut Engineered Products LLC. The device is screwed on the bolt on top of an underneath the nut, and has a series of protruding barbs that locks the nut in place when the nut is tightened then twisting the Palnut to lock the bolt in place. The Palnut itself is a reusable means of bolt stability. While there are some better means of permanent fastening methods. Palnut's are a good solution to low maintenance and fast means of securing two items together and ensuring that they stay together.

Primary Uses

The Palnut Fastener is primarily used in situations that require a high pressure placed on a bolt but a permanent solution such as welding is not possible. Such as in high vibration environments, etc. The main use is for environments that require high amounts of maintenance, but need a secure hold as well. The Palnut ensures that the hold will be tight and secure but also fast to disassemble. Due to the stainless steel makeup it is also ideal for high heat and high pressure environments. When the bolt is going into a softer material such as copper it is more ideal to use a Palnut compared to other fastener because the teeth and friction fit make it a simpler and more ideal solution due to the speed of appliance and reduced cost.

Common Platforms

• Threaded Palnut
  • Used in high temperature environments. Highly reusable compared to non-threaded alternatives.
  • Decreased assembly time and viability in high stress environments.
  • Easy to maintain.

• Non-Threaded Palnut
  • Removes the need to thread bolt holes.
  • Faster manufacturing method for securing and fastening bolts. Recommended for vibration resistant work.
  • The friction fit reduces torque requirements and allows for lower tolerance requirements.
  • Ideal for use in soft metals that do not need to be tapped.

References

• Zen Cart™ Team. “Palnut® Fasteners.” Palnut® Fasteners : Apex Fasteners, apexfasteners.com/fasteners/palnutreg-fasteners.

See also

• https://www.apexfasteners.com/fasteners/images/Palnut_Combined.pdf Unable to reference
• Locknut
• positive locking device
• castellated nut