Luger Grip Screw Thread Size

[Kiwi Mark]

I have made grips screw by screw cutting the lathe. At the time, I found them to be 0.010" under 5mm and 0.8mm pitch. Just checked my taping chart and they are 3/16 x 32 tpi or 3/16 BSF.
Yes, I know, what are the very clever Germans using a Englander thread. That I don't know??
Maybe a Reasonable Knownable Person can answer??