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- Spiral Point with 3-5 lead in threads for through hole applications
- High Speed Steel
- Bronze oxide
- Recommended drill size is 29/64 for 72 percent of theoretical threads
- Made in the USA
This fits your .
1/2-20 NF T63HD, Fractional, Thunder Tap, High Speed Steel, Spiral Point, Bronze Oxide Spiral Point with 3-5 lead in threads for through hole applications.