Can you route for Sanway buttons? What's the maximum thickness they can be installed in?
Just FYI Sanwa snap in buttons are OBSF, screw in type are OBSN. For Seimitsu, if the product code ends in P,K or no number at all its a snap in, if it ends in N its a nut type. If it ends in CP (I think) it means it has a translucent plunger, refer to the letters before (usually KN. i.e nut)
Obviously Sanwa OBSF and Seimitsu snap in types can be mounted in any thickness panel.
The Sanwa OBSN and Seimitsu nut styles can be mounted in panels up to 8mm thick. I read its 7mm but I have found 8mm is fine.
As stated you can mount them to a metal plate or a section or acrylic etc with a section routed out below.
I believe the proper way to do it is to route out the area below the buttons but leave some material for extra strength. This is a cocktail panel I did for a customer made from 18mm MDF. I used 3mm acrylic and routed the MDF to 5mm thick around the buttons to give a total of 8mm.




Before you go and buy a load of Sanwa buttons I would suggest you get a couple of Sanwa and a couple of Seimtsu to see what you think of them. Personally I am not a big fan of Sanwa buttons but I love the Seimitsu's but some people are the other way round.