I need to replace and have on hand a few spare key set screws for my OTK rear hubs. The set screws have a very odd thread of M4x0.8. I find tons of M4x0.7, but the only thing I find in the size I need are taps. None of the usual outlets list my hub or set screw online and as I’ve found with other parts when I call, if it’s not on their website, they don’t have it and can’t get it.
So… anyone have a source of some set screws sized M4x0.8 that are 19mm long? I’ll take what I can get, but if I get my choice, they’d be cup point. A last resort would be to drill and tap for an M5x0.8, of course.