Description 1 Review 24 vs 30mm The SANWA OBSF-24 is the smaller cousin to the Sanwa OBSF-30 pushbutton. Most joystick start, select or turbo options use this button. These buttons are compatible with the MadCatz line of FightSticks, Qanba FightSicks and custom joysticks. These low-profile buttons are specifically for joysticks that use a metal control panel. Sanwa's 24mm button snap right into most configurations, and offer the best reaction time, smoothest and quietest of any button. The buttons are available in a variety of colors for great customization. 1 Review Hide Reviews Show Reviews WRITE A REVIEW Write a Review Close × Sanwa Denshi Sanwa OBSF 24mm Pushbutton Dark Blue Rating Required Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Required Email Required Review Subject Required Comments Required Just the look I was going for!!!! While the buttons aren’t a true dark blue, they still gave my stick the look I wanted. They perform like Sanwa button should. So all and all I can’t complain Unknown on Oct 22nd 2019 When processing orders, a frequent mistake we found among new players is choosing the wrong size for action buttons, such as punch and kick. Within the fighting game genre, Japanese arcade buttons commonly consist of two diameter sizes: 24 millimeter and 30 milllimeter (mm). In most configurations, 30mm represents your action button. These are front facing, appearing most prominent on your Fightstick control panel. Option button, such as "Start", "Select", or more recently "Option", "Touch", or "Share" are usually 24mm. UPDATE: Owners of Neo Geo AES Joysticks will need 24mm pushbuttons instead of 30mm (Thanks SRK's DEZALB) Below is a visual representation of a common Fightstick control panel. Throughout this article, we will mark 24mm in green, and 30mm in Orange. Checking the Proper Size Another way that players can misinterpret the pushbutton size is by measuring the pushbutton plunger. Have a look at the diagram at right. The plunger - the part that you press down to represent an input - is 25mm or a bit smaller in most 30mm pushbuttons. Often this leads to the conclusion that one needs a 24mm button and not 30mm. Similarly measuring the button rim can lead to confusion, as it is intentionally larger than the button hole it is placed in. You don't want to use these measurements. Instead, review the button housing diameter, or the hole the button will be placed in. You can do this with a caliper - a digital caliper is often quite helpful for this and other arcade-related projects. Control Panel Configuration Most Fightsticks from MadCatz, Hori, Qanba, and similar will use these two sizes. How the buttons are used will depend on the model joystick that you own. Over time, we'll provide example configurations for specific popular Fightstick models and arcade cabinets using the color key for 24mm (green) and 30mm (orange). We'll also expand the key for future models if another size is introduced, and we offer for sale.
Installation Quick Reference
Mounting: Snap-in buttons push into a 30mm hole from the top of the panel. Screw-in buttons thread from below and secure with a nut. Use 2-3mm acrylic, wood, or metal panel.
Wiring: Connect the microswitch terminals to your encoder or PCB. Common ground shared across all buttons. Quick-disconnect (0.110") terminals are standard on Japanese buttons.
Dimensions
Troubleshooting
Not responding to input
Check wiring continuity with a multimeter. Verify the contact block is properly seated. Inspect terminals for loose connections.