The Sanwa SDM-18 is an 18mm push button and is potentially good fit for smaller button projects. These buttons are a good replacement for legacy fight sticks such as the Sega Virtua Stick High Grade (VSHG) and are also good as service buttons for pinball machines.
The body of the switch features securing lugs on each side and is designed to be inserted into panels between 0.5mm and 2mm thick. The mounting hole should be 17.8mm.
Connectors: 2.8mm (0.110″) spade connectors on the bottom.