Quote Originally Posted by Big Al1 View Post
If you mean the escutsion for the forearm release button, I removed one from mine and as close as I can tell it's an 6x40. I measured the threads with a thread pitch gauge, a 6x48 did not work! Screw measured .128"
Thank you. I believe you are very close as this screw measures .131. This screw is for the tenon fitted to the dovetail in the barrel which the forend latches onto. I think it was a half dog screw but sometime in the last 100 plus years the nub has worn away and the screw was damaged by being tightened against the barrel dovetail proper instead of the mortice in said dovetail. I appreciate your response.