A momentary (not locking) panel mount push button, you choose colour/pack
Note that currently there are two shades of the yellow button, one is lighter than the other, it doesn’t show well on camera but quite obvious to my mark-1 eyeball. The packs-of-4 are made up with the deeper yellow, light yellow only available on their own.
Required hole size 12-15mm
17.5mm bevel/flange
Includes nut and spring washer
Two solder or spade terminal on the back are 3mm across.