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

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.

A good quality tap, does the job effectively. But, the bottoming taps Im used to are completely flat at the end with the cutting edges all the way to the end, this is not. This is more like a plug tap than a bottoming tap. Still works, but be aware of that.

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.

Great

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.

Great quality and it works perfectly!

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 : )

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.

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.