AR-10 pistol grip screw size

PSA Products AR-10
1

What is the correct size, length, and pitch of the pistol grip screw?

2

1/4"-28 x1" same as ar15

3

Thank you very much!

4

Ditto. I have a Replica of the Original AR-10 Grip on one of my Retro AR-15’s. , everything is the same.

5

Thanks!