In the next screenshot, you can see a bunch of different momentary push buttons of two kinds:
Printed circuit board (PCB) soldering: These used to be smaller, really tiny in some cases, and they come with little legs that allow them to be soldered through holes in a PCB. In the screenshot, they are the three on the left-hand side.
Panel mounting: These are the three on the right-hand side in the picture. Usually, they come in a much bigger size than the PCB kind and come with bigger connections so that wires can be soldered to them. They usually come with some kind of nut so that they can be fixed to a panel.
Different momentary push buttons
Physical differences apart and looking at them from the connection point of view, we have to notice an important difference between both groups.
If you take a closer look at the PCB group or, even better, if you perform a simple search on the Internet, you will notice that these kinds of momentary buttons usually come with a total...