Question on Grip Screws

[A.Mifsin]

"I ended up tapping my grip frame with the 3/16" x 32 tap...The Luger grip screw fits just fine... "

Hi Postino, is the 3/16"x32 BSF or Whitworth.
Alf.

[ithacaartist]

The way I recall the Whitworth tap I just bought and chased grip screw threads with was listed both ways. BSF=British standard fine, which is the fine version of BSW=British standard Whitworth(coarse thread). So whit.3/16-32 would be the same as 3/16 BSF.
Here's a thought, did the original post seek larger diameter HEADS for the grip screws? I've noticed that this is the case for Erma La-22's; but since I am away from the guns in question, cannot say right now. The Erma grip screws have a significantly larger head diameter, so if thread size and pitch somehow match, they could work where this would be needed--or turned down a tad if the dia. is excessive.
David Parker

[A.Mifsin]

Thanks, the problem is I can't find 3/16"x32 Whitworth(BSW), only 3/16" x 32 BSF .
Alf

[sheepherder]

Originally Posted by ithacaartist

Here's a thought, did the original post seek larger diameter HEADS for the grip screws?

Yes. Here is a copy of the Numrich Luger P-08 parts listing, just for S&G...I only noticed this today (Numrich has a habit of listing 'Not Illustrated' parts wherever they please...)

466070 Grip Screw (.258 OAL, .393 Head Diameter, Thread Pitch M5 x .8; 2 Req'd) $3.55

1430020 Grip Screw (.193 OAL, .344 Head Diameter, M5 x .8) $3.45

1430010 Grip Screw (.214 OAL, .373 Head Diameter, M5 x .8, Beveled) $3.45

I ordered two of the .393 dia screws...I'm doubtful of their thread pitch, but I hope they can read a caliper correctly...