- Make sure this fits by entering your model number.
- Bottom Tap with 1-2 lead in threads
- High Speed Steel
- Bronze oxide
- Recommended drill size is 7/8 for 77 percent of theoretical threads
- Made in the USA
This fits your .
1-8 NC T61HDB, Fractional, Thunder Tap, High Speed Steel, Bottoming, Bronze Oxide Bottom Tap with 1-2 lead in threads.