I know this post is over a week old, but I'm staring at this and not understanding? What about the Dunlop button keeps you from using a longer screw? IME, the hole can take whatever length screw you want to put in it.
I probably should have worded that differently.![]()
I have not been able to find a screw with a shaft longer than one inch (or maybe it's 1 1/2", I forget now) that has a head narrow enough to fit in the Dunlop strap button. Maybe one exists somewhere, but the screws that come with a set are no longer than that and no hardware store I have been to has one. If anyone is aware of such, I'd be delighted to be pointed towards it.