H&R shotgun bead thread size?

[TX-Hunter]

I posted this in the NEF forum, but this may be a better place.

What size drill and tap do I need to move the bead to it's new location?

Thanks

[gunnut69]

They range from 3x56, 5x40, 6x40, and 6x48.. If you've taken out the existing bead, simply measure and go from there.. I find 6x40 common on guns made over seas and 3x56 common for center beads and 5x40 a common size for US made guns.. Be aware that some makers don't thread beads into barrels any more. They drill  a tapered hole and press the bead in place(perhaps a little super glue??). Sometimes they install a circular crimp around the installed bead to retain it. I usually just drill to the next size that will clean up the hole, tap and install a replacement..

[TX-Hunter]

well, i "trimmed" the barrel, so i will be making a new hole and threads.  the existing hole is itty bitty.  i may just hafta go to the hardware store and do some testing

[gunnut69]

If you don't have the beaad that was in the hole to measure then simply buy whatever size/shape of bead you want and the installation tools.. If the hole was really small and threaded it was likely a 3x56.. Brownells sells the bits and taps for this size and if you want the have beads of various flavors also..

[quickdtoo]

Carlson's offers the beads, drill and tap in one package for $10.

Tim

http://www.choketube.com/sights.html