What size drill bit would I use to drill hole to then to a 1/4' tap to make threads? Would I be using a 1/4 drill bit or is a 7/32' better
![Everything you wanted to know about taps but were afraid to ask, styles of taps, class of thread , gh numbers , basic point in thread measurement , constants for finding pitch Everything you wanted to know about taps but were afraid to ask, styles of taps, class of thread , gh numbers , basic point in thread measurement , constants for finding pitch](https://www.newmantools.com/taps/fig9.gif)
Everything you wanted to know about taps but were afraid to ask, styles of taps, class of thread , gh numbers , basic point in thread measurement , constants for finding pitch
![NPT & NPTF NPS & NPSF Pipe Tap Size Pitch (TPI) Drill Size* (inch) Pitch (TPI) Drill Size (inch) 1/16 27 0.242 (C) - - 1 NPT & NPTF NPS & NPSF Pipe Tap Size Pitch (TPI) Drill Size* (inch) Pitch (TPI) Drill Size (inch) 1/16 27 0.242 (C) - - 1](https://alliedmachine.com/AlliedMachine/media/AlliedMasterPageImages/OnlineTools/Tap%20Drill%20Charts/Thumbnails/LPI_National-Pipe-Threads.jpg)
NPT & NPTF NPS & NPSF Pipe Tap Size Pitch (TPI) Drill Size* (inch) Pitch (TPI) Drill Size (inch) 1/16 27 0.242 (C) - - 1
![12 Piece Carbon Steel NPT Pipe Tap and Die Set, 1/8", 1/4", 3/8", 1/2", 3/4" and 1" in Wooden Case | DWTNPT-SET | DrillsandCutters.com 12 Piece Carbon Steel NPT Pipe Tap and Die Set, 1/8", 1/4", 3/8", 1/2", 3/4" and 1" in Wooden Case | DWTNPT-SET | DrillsandCutters.com](https://cdn11.bigcommerce.com/s-zbaqm/images/stencil/1280x1280/products/135814/547866/npt-shank__55115.1587413385.jpg?c=2?imbypass=on)
12 Piece Carbon Steel NPT Pipe Tap and Die Set, 1/8", 1/4", 3/8", 1/2", 3/4" and 1" in Wooden Case | DWTNPT-SET | DrillsandCutters.com
![water pipe connector for garden brass connectartap connectors for hose tap connector threaded 1/2 inch 3/4 inch faucet tap adapter pipe connector for tap water pipe connector for gardening water pipe connector for garden brass connectartap connectors for hose tap connector threaded 1/2 inch 3/4 inch faucet tap adapter pipe connector for tap water pipe connector for gardening](https://www.divinetreeindia.com/pub/media/catalog/product/cache/c687aa7517cf01e65c009f6943c2b1e9/b/r/brasstapconnector_eg366t.jpg)