Mark and Kim Smith wrote:

Norman D. Crow wrote:

snip

583 Not to start a pi**in' contest, but the correct term is "Castellated"
nut, although commonly called castle nut. Most familiar use is in the front
suspension & steering of cars/trucks to insure nothing vibrates loose.



Sorry, not true. You have the name right but the usage wrong. Slotted
nuts are used on truck and automotive spindles, not Castellated nuts.
There is a difference.

snip



I suggest you consult a dictionary for the meaning of castellated,
a hint, it has nothing to do with truck & automotive spindles.

Tom