That makes me nervous. Unless I'm missing something, I think it introduces a small amount of motion into a place where there should be none. Ultimately, I would expect nut loosening or bolt failure. Any reason not to use stock style mounts with lift blocks (other than the PITA factor)?
No real reason. I do want to learn about this type of fastener though and if it is sufficient in my current configuration f the nut and bolt. It really cuts down on vibrations. The real issue in my mind is if the friction force that holds this type of connection is solely between the nut and bolt threads, or if the added friction of the nut and head face against the mounting bracket contributes to holding the connection. From what I read it sounds like it's should be solely between the threads of the nut and bolt.
Strangely, on Brown Dog website they repeatedly say, "make sure and follow proper torque specs for Brown Dog MM installation." Search as you may there are no torque specs on the website. In a couple of places it says to "get them snug, but don't over-tighten".
Here's what I put together from reading about stover/top lock nuts/prevailing torque lock nut/et. al., names.
A lock nut is a special type of nut that won’t loosen even exposed to vibrations...It has a locking mechanism that’s built into the cone, as you put it on, it starts to act like a locking nut due to the distortion of their top threads, creating frictional interference between the threads of the mating components which is said to be
capable of withstanding severe vibration and shock loads. When fastening a prevailing torque lock nut, there is a resistance to rotation during both assembly and disassembly
requiring them to be wrenched; that resistance is called prevailing torque.
The advantage is that disassembly is unlikely even if preload diminishes completely because of the remaining rotational resistance.
Because they stay put without being seated, they are used as stop nuts or spacers for rotating or other components.They can be adjusted or removed after installation.
Stover lock nuts are reusable a limited number of times because the prevailing torque declines each time the nut is used (my one area of concern). Always follow the manufacturer's recommendations regarding nut reuse, thread lubricants and torque values.
Do not apply standard torque values to prevailing torque lock nuts because the joint may not be tightened to the correct clamping force due to the additional friction of the locking element (very interesting).
