Just for S&G, I tried a Luger grip screw in my crimping pliars...(electricians pliars)...It went in nice & easy; not too tight, not too loose...It's the #10-32 hole...
A #10-32 HHCS goes in nice & easy, too...But won't go in a Luger grip frame...
...Doesn't prove anything...Just thought I'd throw this in here...