![uxcell 1/4-28 UNF Straight Flute Tap Left Hand and 5.4mm Twist Drill Bit Set, Titanium Plated High Speed Steel Drilling Bit Machine Threading Tap - Amazon.com uxcell 1/4-28 UNF Straight Flute Tap Left Hand and 5.4mm Twist Drill Bit Set, Titanium Plated High Speed Steel Drilling Bit Machine Threading Tap - Amazon.com](https://m.media-amazon.com/images/I/61CMKNHmNgL.jpg)
uxcell 1/4-28 UNF Straight Flute Tap Left Hand and 5.4mm Twist Drill Bit Set, Titanium Plated High Speed Steel Drilling Bit Machine Threading Tap - Amazon.com
![BSW BSPP BSPT Pipe Tap Size Pitch (TPI) Drill Size (inch) Pitch (TPI) Drill Size (inch) Pitch (TPI) Drill Size* (inch) 1/16 60 0 BSW BSPP BSPT Pipe Tap Size Pitch (TPI) Drill Size (inch) Pitch (TPI) Drill Size (inch) Pitch (TPI) Drill Size* (inch) 1/16 60 0](https://alliedmachine.com/AlliedMachine/media/AlliedMasterPageImages/OnlineTools/Tap%20Drill%20Charts/Thumbnails/LPI_British-Standard-Pipe-Threads.jpg)
BSW BSPP BSPT Pipe Tap Size Pitch (TPI) Drill Size (inch) Pitch (TPI) Drill Size (inch) Pitch (TPI) Drill Size* (inch) 1/16 60 0
![Made in USA - Combination Drill Tap: 1/4-28, H3, 2B, 2 Flutes, High Speed Steel - 82770280 - MSC Industrial Supply Made in USA - Combination Drill Tap: 1/4-28, H3, 2B, 2 Flutes, High Speed Steel - 82770280 - MSC Industrial Supply](https://cdn.mscdirect.com/global/images/ProductImages/8277028-23.jpg)
Made in USA - Combination Drill Tap: 1/4-28, H3, 2B, 2 Flutes, High Speed Steel - 82770280 - MSC Industrial Supply
![Homaisson 13pcs Drill Tap Bit Set, SAE/Metric Tap Drill Bit Combination Set with 1/4”Quick Change Hex Shank Adapter, Titanium Steel Drill Tap Bits for Drilling, Tapping, Countersinking: Amazon.com: Tools & Home Improvement Homaisson 13pcs Drill Tap Bit Set, SAE/Metric Tap Drill Bit Combination Set with 1/4”Quick Change Hex Shank Adapter, Titanium Steel Drill Tap Bits for Drilling, Tapping, Countersinking: Amazon.com: Tools & Home Improvement](https://m.media-amazon.com/images/I/61TdQBT1U-L._AC_UF1000,1000_QL80_.jpg)
Homaisson 13pcs Drill Tap Bit Set, SAE/Metric Tap Drill Bit Combination Set with 1/4”Quick Change Hex Shank Adapter, Titanium Steel Drill Tap Bits for Drilling, Tapping, Countersinking: Amazon.com: Tools & Home Improvement
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
![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)