A quality momentary SPST switch, perfect as a starter button, Comes with a special boot that keeps out dust and weather.
The dimensions of the switch (part number 10-00821) stem is 3/4 inches long x 5/8 inches diameter. Panel hole diameter must be determined by installer at time of install. Aircraft Spruce cannot be held responsible for panel work done ahead of time based on these dimensions.
The diameter for the boot on the push button switch (10-00821) is 1.05"
The wire gauge will depend on the amperage and distance. Please consult with the AC 43.13 part number 13-06923.