They are the same as 1911 screws. They are 0.150-50. If you have factory Kahr wood grips, the 1911 "thinline" grip screws "might work"...or you could get the standard 1911 screws and shorten them a "little" bit.
Look here as this is the cheapest place I have found to date and fast shipping to boot.
I e'ed a nice lady Mel at KAHR and she is checking on them, plus I was sent an E that the 1911 grip screws work. I will have to wait till they get
here and check out length unless I hear back from Mel. She replies fast.