Personally I am not a big fan of grip screws that go into the frame on my PT 940. So, I ordered bushings and PT 92 grip screws from Hogue. They fit perfectly. Now don't have two different screw sizes and I don't have to worry about stripping the threads in the frame. I would highly suggest them.
Part numbers: 92009 for the screws and 92069 for the bushings.