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

[Randall]

> Would it be a good idea to place a flat washer on the bolt head too?

IMO if it's a bolt and nut, then generally no need for a flat washer under
the head, since it doesn't turn or take a lock washer.  But if the bolt
threads into a casting, then generally a flat washer is appropriate.

Generally, though, I go with the original arrangement as shown in the parts
catalogue :^)

Randall


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