These chrome-plated momentary metal buttons are rugged and look great! Simply drill a 16mm hole into any material up to 1/2″ thick and you can fit these in place, there’s even a rubber gasket to keep water out of the enclosure. On the front of the button is a flat metal actuator and on the back there are 2 screw terminal contacts for the button.

This button is momentary button, when you press it the ‘normally-open’ contact shorts to the common contact. When you release the button, it springs open, and the contacts open up again.