![IRWIN Drill And Tap Set, 8 - 32 NC Tap and No. 29 Drill Bit (80217) - Jobber Drill Bits - Amazon.com IRWIN Drill And Tap Set, 8 - 32 NC Tap and No. 29 Drill Bit (80217) - Jobber Drill Bits - Amazon.com](https://m.media-amazon.com/images/I/41aaTmWhf4L.jpg)
IRWIN Drill And Tap Set, 8 - 32 NC Tap and No. 29 Drill Bit (80217) - Jobber Drill Bits - Amazon.com
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
![Century Drill & Tool 8-32 National Coarse Carbon Steel Tap-Plug and #29 Wire Gauge Drill Bit - Henery Hardware Century Drill & Tool 8-32 National Coarse Carbon Steel Tap-Plug and #29 Wire Gauge Drill Bit - Henery Hardware](https://6598-cdn.doitbest.com/Data/ItemImage-328456-q5vsem-6qo400-5exfkb.jpg?AutoCrop=1&CropHeight=1440&CropWidth=1440&Height=1440&Padding=1&Quality=50&Resize=Auto&Revision=Cq2q&Timestamp=qrYgQG&Width=1440)
Century Drill & Tool 8-32 National Coarse Carbon Steel Tap-Plug and #29 Wire Gauge Drill Bit - Henery Hardware
![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)