I thought it was the same as the grip screw on my Model 10, which I think is 5-44 (?). I have a pair of Altamonts for my 625-8 and the screw diameter appears to be the same (.118"-.119") but the pitch is different. Unfortunately I don't have a standard pitch gauge (just metric.) Perhaps 5-40?
Update: After taking a pic and doing a bit of squinting, I think I can safely say that the screw on my Altamonts are 40 TPI. Major diameter is ~.119, so definitely not #6
Alk8944 said:
Call Kim and ask him:515-532-3449 My money is on 6x32
Which Altamont grips do you need a screw for? The last three sets of Altamont grips I bought came with 3 different lengths of screws. What length do you need? I'll look and see if I have one the right length.