Genuine Sanwa OBSN-30 30mm round push button with a built in microswitch, they have a short throw, positive yet quiet actuation and are great for fast paced action games.
These buttons pop into 30mm holes in control panels up to 7mm thick and are secured with a fixing ring that screws into place. A good alternative when your control panel is a bit too thick for an OBSF button.
Available in a variety of colours… we also have Sanwa joystick balltops and 24mm buttons to match!
Connect these to your encoder via the 2x 2.8mm (0.110″) spade connectors on the bottom.