![1/4-20 Complete Helical Thread Repair Kit - Includes 3 Lengths of Inserts, HSS Drill Bit, STI Plug Tap & Installation Tool 1/4-20 Complete Helical Thread Repair Kit - Includes 3 Lengths of Inserts, HSS Drill Bit, STI Plug Tap & Installation Tool](https://www.threadtoolsupply.com/cdn-cgi/image/quality%3D85/assets/images/chrislynn/helical-insert-thread-repair-kit.jpg)
1/4-20 Complete Helical Thread Repair Kit - Includes 3 Lengths of Inserts, HSS Drill Bit, STI Plug Tap & Installation Tool
![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
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
![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
![UNJC Minor Ø Recommended Drill Size Ø Pitch (TPI) Min Max Drill Size Decimal (in) #4 40 .0877 .0942 2.30mm .0906 #5 40 .1007 . UNJC Minor Ø Recommended Drill Size Ø Pitch (TPI) Min Max Drill Size Decimal (in) #4 40 .0877 .0942 2.30mm .0906 #5 40 .1007 .](https://alliedmachine.com/AlliedMachine/media/AlliedMasterPageImages/OnlineTools/Tap%20Drill%20Charts/Thumbnails/LPI_Unified-National-J-Series.jpg)