[time-nuts] Brass screws
Hal Murray
hmurray at megapathdsl.net
Tue Jan 17 17:40:02 UTC 2017
jebponsonby at gmail.com said:
> Though nominally made of copper and zinc, common brass often shows residual
> ferro magnetism because it is "recovered" metal and is contaminated with
> iron. That brass must never be used in a magnetic instrument have been known
> for a very long time.
What do people use?
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