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

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!

this should work I will let you know.

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.

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.

Seems well made, but did not use, since appeared would have enlarged threads for Savage 12 FV scope bases too much, and ended up not even having to chase threads in order to mount Warne 7666-20MOA picatinny rail.

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

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.

This tap worked as expected the first time, although it will not see frequent use in my shop. It did the job just fine so l am pleased with the results. I have no complaints.

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.

Worked very well tapping a barrel for a bead sight!