[sdiy] UNEF threads

[jhaible at debitel.net]

Here's a mechanical question about mounting potentiometers
on a front panel:

If a pot is specified to have a 

1/4-32 UNEF-2A  thread,

is this a *standard* 1/4" Unified Extra Fine thread,
or does the -32 and -2A part mean a variation of the
standard ?

JH.

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