Originally Posted by billt460
Originally Posted by bubbatime
Call the manufacturer of the gun and they will send you the proper , correct size plugs that they ship with the gun when new for free or a small charge.
Here is the problem with trying to reinstall factory plug screws. (Especially on Aluminum receiver shotguns). The threads in the receiver are tapped all the way through. The inside of the receiver is usually finish machined last, after the holes are tapped. This produces small burrs at the very bottom of the threaded hole, that effectively prevent the factory plug screws from going all the way through, and falling out.
Once the owner mounts any type of rail and torques it down, those burrs are removed, because the mounting screws usually pass through the receiver slightly. The mounting screw itself acts much like a tap, removing them. Then, if and when someone removes the rail and screws, and tries to install original factory plug screws, there is nothing to prevent the plug screw from going straight through, and end up falling into the receiver..... Or else backing out, with the same result.
The only solution is to use positive stop plug screws. Or else use a thread locker, which makes the "fix" all but permanent. Because it is very difficult to remove small, fine threaded plug screws, that have been exposed to most any type of locking agent. About the only worthy fix, (if you ever want to mount anything again), is to have a gunsmith drill them out, then tap the receiver to the next larger thread size.
The loctite I recommended would be perfect for the OP's application, and the plugs would be easily removed in the future with some heat.
