Drill America - DWT54506 5/16-18 UNC High Speed Steel Bottoming Tap, (Pack of 1)

Good price. Works well.

I got two taps and a die from Drill America on this order. The taps are good/excellent but the hex die was a weird comically tiny nonstandard size (an M8x1.0 with a bizarre tiny 11/16 hex width almost like youd expect with the micro and jewelers tiny round dies or something). The M8 tap I received had to be returned but overall it was decently ground and good quality with some niggles in form/design compared to typical US made or US branded taps. This little 4-48 tap is great, though, darn close to US hss taps I normally use. The teeth are expertly ground and clean, angles seem right, both ends are finished cleanly. Ive only put one hole 1/4 deep into some mild steel but the action felt great and the threads were beautiful. Ill be angry-sad when this tap eventually snaps, as all the tiny ones eventually do, but initial impressions are excellent.

I bought these having to do a project. Tap works great!

Bought this tap to thread holes in a cast iron transmission pan on an old tractor. It cut the iron no problem. Did 8 holes and was still cutting the threads well. Very happy. I used a size F drill bit and then tapped the holes with this. Nice tool.

As a gunsmith I deal with many abused platforms. This tap works wonders for chasing 6-40 screws like scope rings and small trigger group screw holes. Ordered and it showed up as promised.

This 3-48 tap cut cleanly and easily, small taps are always a challenge. Very nice

Great for mounting sights on guns.

I received this product and it was of great quality and completed the job perfectly. I used it to tap aluminum piping. Unfortunately after completing the job, I realized I had purchased the wrong size. Overall though, it did a great job at what I ordered it to do. Thank you!

worked for me

I hand tapped over 30 holes at 4mm depth for some grub screws and they all came out perfect. Lots of the negative comments are from misuse. Remember to use cutting oil and back out a little constantly. Most importantly, make sure you are pre-drilling the right size diameter hole before tapping. The correct size can be found online. For an M4 tap, you need a 3.3mm hole.