[mdredmond]

Is there a "standard" through-panel fastener used for most or all panel-mount instruments - or do manufacturers just use whatever they feel like using?

 

[noelf]

The "standard" is "typically" brass...

...and the thread sizes can be 4-40 for the light stuff, 6-32 and /or 8-32 for the other stuff. I found the most common size to be 6-32. That said, my Falcon Gauge electric DG uses a metric size screw. The screw lengths vary all over the range.

 

[lucaperazzolli]

I used this

http://www.aircraftspruce.com/catalog/hapages/brassinstrscrew.php

my 2 c

 

[mdredmond]

Awesome - thanks guys!