re: bolts and nuts

[Dana Loomis <dloomis@domain.elided>]

Greg Hermann wrote: 

>Standard (good) design practice with studs installed in castings is to use
>a course pitch thread on the end in the casting and a fine pitch thread on
>the end meant to accept a nut.
>
>This becomes emphatically true when dealing with a light alloy casting.

Perhaps he'd also be willing to explain why is this so important.  I'd like
to understand.

Dana Loomis
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