winmag45 14 Posted April 27, 2020 I went to put a stock adapter on my 590 and it didn't line up perfectly and I crossed the first thread.Does anyone know the thread size so I can get the right size threader and clean up the edge.?Thanks Quote Share this post Link to post Share on other sites
Longranger 16 Posted April 27, 2020 winmag45, Well, I didn't pull my 590A1 apart to check, but I just happen to have an aftermarket pistol grip stock for a Mossberg lying around here and it has a short attaching bolt that is a 5/16-18 thread. Hope that helps. -Longranger Quote Share this post Link to post Share on other sites
winmag45 14 Posted April 27, 2020 Thats the one,thanks a bunch!! Quote Share this post Link to post Share on other sites