Hi Wayne

As always, they're a bit of a mixture.  The .09s are M5, .15 to .20 are M6, and the 45-II and 60-IIIB are M7.  Everything else (ie SS25/30/35/40/45/50, 40XZS, and 61CXS) is 1/4-28.  I'm afraid I don't know about the new .32s, but I'd suspect that they're 1/4-28 as well, seeing as that's what they seem to have gone with for their newer designs.

Cheers
Steve

That's not all that horrible. Standard Metric stuff is easy to get, usually even at your LHS or local ACE or True Value Hardware. Better that, than do what OS has always done on their .15's....used 7/32-32. I priced a tap once...$45. Didn't do that!  Steve