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

Worked very well tapping a barrel for a bead sight!

The tip of the tap (which will not make threads) is a bit longer for a bottoming tap but the quality of the tap is OK and it fits very well on the threaded holes of the rifle leaving a clean thread.

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.

Worked perfect....for those that dont know use your drill press manually to thread your hole right after you drill it..once you reach how far you want unchuck the tap and back it outby hand to make sure you feel that it threaded good and comes out with ease. I bought three taps afraid they would break but using above method kept that from happening. Will probably rust away before I ever get to second one.

this should work I will let you know.

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

Probably due to my own inexperience with using items like this but the tap would constantly slip from the handle I was using, warped and then finally snapped. Part of the tap I suppose is forever in my rifle now which is unfortunate.

It did what it supposed to do on my savage 12fv. Needs to be lubricated to push excess metal pieces. 4 stars cuz of 2 days late delivery.

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 : )

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.