[TR] Is there a rule of thumb on when to use a flat washer with a lock nut/nyloc?

[Randall]

> Why?  Must be a good reason.

I've not read Carroll Smith's book yet, but IMO one good reason for using a
flat washer is to spread the load whenever the underlying material is
softer/weaker than the nut.  Sheet metal or aluminum always gets a flat
washer.  'Split' lockwashers also tend to tear up castings, so use a flat
washer there, too.

Randall 
(Tedious but unavoidable disclaimer follows) 






CONFIDENTIALITY. This electronic mail and any files transmitted with it may contain information proprietary to NavCom Technology, Inc., or one of its affiliates, and are intended solely for the use of the individual or entity to whom they are addressed, shall be maintained in confidence and not disclosed to third parties without the written consent of the sender. If you are not the intended recipient or the person responsible for delivering the electronic mail to the intended recipient, be advised that you have received this electronic mail in error and that any use, dissemination, forwarding, printing, or copying of this electronic mail is strictly prohibited. If you have received this electronic mail in error, please immediately notify the sender by return mail.