1/2" - 20 Bottoming Tap, High Speed Steel - National Fine Thread
Model #: TAB-1/2-20
- Thread Diameter: 1/2"
- Threads per Inch: 20
- High Speed Steel.
- Ground Thread.
Bottoming taps have 1 to 1-1/2 threads of lead, for threading close to the bottom of a blind hole.
Please note that not all bottoming taps are flattened at the end.
Some manufacturers leave a point that you may have to grind off if going very close to the bottom of a hole.