What Size Drill Bit for a 4” NPT Tap?
The 4” NPT tap is one of the biggest pipe taps you can use. 4” NPT taps are generally made with carbon steel or high-speed steel. If you want to know what size drill bit a 4” NPT tap is, read further. What Size Drill Bit for a 4” NPT Tap? A 4” NPT Tap … Read more