Anybody know the screw size in a Mossberg 590 barrel?

mikikanazawa

New member
Hey group, I have a new Moss 590 barrel (Parkerized) that has no sight and no nut that holds it to the end of the mag tube.

I can make the nut and retainer, but there's a threaded hole in the bottom of the barrel band with an unknown (to me) thread pitch and diameter. It looks like the hole is for a setscrew that holds the barrel nut assembly in place.

I don't have a screw gauge and I don't exactly want to be swinging this thing through my local Lowe's to test-fit screws.
 
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