IRWIN Bottoming Tap, #6-48NS (1221)

this should work I will let you know.

This tap has the common thread pitch for shotgun sights and is very difficult to find in stores; if not impossible. I have a Remington 870 express magnum shotgun which has the front ball sight pressed in; not threaded. After removing the ball sight, I used this tap to begin threading the hole. The hole is very shallow though, so once the tap hits the bottom, I had to dremel off the tapered bottom so I could continue tapping the threads all the way down to the bottom of the hole. For the price, the one time use didnt bother me : )

Purchased the tap more as a thread chaser to clean up threads on rifle receiver. This worked great for cleaning out old Blue Loctite from the scope base screws.

Hard size to find 6-48 Needed a bottom tap to clean up some holes on a gun barrel for mounting a scope. Worked perfect!

There are three basis types of taps: flute, plug and bottoming. This is a flute tap, not a bottoming tap, the photo does not include the flute point at the end of this tap. It looks like the bottom of the tap in the photo has been cut off in the photo. This lead me to believe the description, which said this was a bottoming tap, which it is not. Unless I want to grind off the point of this flute tap, I can not use this tap.

The IRWIN Bottoming Tap, #6-48NS (1221) is just what the gunsmith ordered. Save yourself a bit if hassle and get the one that comes with the correct drill bit.

Great

Cut threads without any issues. Would recommend as a purchase.

Great quality and it works perfectly!

Worked very well tapping a barrel for a bead sight!