I guess I don't see the practical application. These will fill with grime in days if not seconds, depending on application. A torque wrench and loctite more o

I guess I don't see the practical application. These will fill with grime in days if not seconds, depending on application. A torque wrench and loctite more or less make something like this unnecessary. If it's for some specific scientific applications, more power to them. But let's not pretend they just saw something so obvious everyone else has been missing. Edit to add: I actually feel like these should be reverse designed. A small tit that sticks up would probably be much more evident than a hole in most applications.