Century Drill & Tool 95201 High Carbon Steel National Pipe Tap, 1/8-27 NPT
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Questions & Answers
In order to drill an 8mm hole, I used a 21/64 drill bit As shown in the question, there is a 27 NPT tap.
If you are using this size then you would use part number 98510 Adjustable tap wrench.
It was the 3/8" - 6 ft. length that I purchased There is a pipe tap part number 18 on this pipe. For 1/8" one would use 1/4" as a standard size. Here are some tips that might be helpful
Selected User Reviews For Century Drill & Tool 95201 High Carbon Steel National Pipe Tap, 1/8-27 NPT
The end of the rope has not been cut That is all I have to say about it. This tap is not a part of my livelihood and I use it for casual hobby-like use at home.
It should be noted that I do not depend on the tap.

Felt that the threads were a little loose with a tap of this type. There does not seem to be a problem in my case, but I just wanted to point it out. While I was waiting for my gauges to arrive, I picked up a few "plugs" to try and plug the hole I tapped in my exhaust manifold, but all were extremely loose.

The back of the package had instructions for using this product once. After tapping for half a minute, the teeth broke. I do not recommend it.

Taping a drain flange was required as it allowed me to drill a screw hole. 3/8" is too big for this tap to fit in the hole it has a diameter of 3/8" instead.

The product met the specs and worked perfectly for us.

Powder-coated threads were chased with this tool. The job was done.

I found it to be quite effective.

I was very happy with the result.
