![Amazon.com: YG-1 TF020 Solid Carbide Thread Mill for Taper Pipe Threads, ANSI B 1.20.1(NPT)/ANSI B1.20.3(NPTF), TiAlN Finish, 1/16" and 1/8" NPT Size, 27 Pitch : Industrial & Scientific Amazon.com: YG-1 TF020 Solid Carbide Thread Mill for Taper Pipe Threads, ANSI B 1.20.1(NPT)/ANSI B1.20.3(NPTF), TiAlN Finish, 1/16" and 1/8" NPT Size, 27 Pitch : Industrial & Scientific](https://m.media-amazon.com/images/I/31OmZOe6yRL.jpg)
Amazon.com: YG-1 TF020 Solid Carbide Thread Mill for Taper Pipe Threads, ANSI B 1.20.1(NPT)/ANSI B1.20.3(NPTF), TiAlN Finish, 1/16" and 1/8" NPT Size, 27 Pitch : Industrial & Scientific
![1/4-20 x 1 inch Phillips Countersunk Screws (ANSI B18.6.3) - Thread Locking A2 Stainless Steel: Accu.co.uk: Precision Screws 1/4-20 x 1 inch Phillips Countersunk Screws (ANSI B18.6.3) - Thread Locking A2 Stainless Steel: Accu.co.uk: Precision Screws](https://i.accu.co.uk/360/_APC/SIK-A2-R360/0_8.png?cw=100.0000%25&ch=100.0000%25&scale.option=fill&w=500&h=0&q=90)
1/4-20 x 1 inch Phillips Countersunk Screws (ANSI B18.6.3) - Thread Locking A2 Stainless Steel: Accu.co.uk: Precision Screws
![Amazon.com: Small Parts Brass Hex Bolt, UNF Threads, Meets ANSI B18.2.1 Specifications, 1/4"-28 Thread Size, 1-1/2" Length, Pack Of 25 : Industrial & Scientific Amazon.com: Small Parts Brass Hex Bolt, UNF Threads, Meets ANSI B18.2.1 Specifications, 1/4"-28 Thread Size, 1-1/2" Length, Pack Of 25 : Industrial & Scientific](https://m.media-amazon.com/images/I/718z88jcLFL._AC_UF894,1000_QL80_.jpg)
Amazon.com: Small Parts Brass Hex Bolt, UNF Threads, Meets ANSI B18.2.1 Specifications, 1/4"-28 Thread Size, 1-1/2" Length, Pack Of 25 : Industrial & Scientific
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
![5 Piece NPT Thread Forming Taps, Pipe Taps Set, High-Speed Steel Drill Bits for Cleaning or Re-Thread Damaged or Jam Pipe Threads, Size 1/8", 1/4", 3/8", 1/2", 3/4" : Amazon.ca: Tools & 5 Piece NPT Thread Forming Taps, Pipe Taps Set, High-Speed Steel Drill Bits for Cleaning or Re-Thread Damaged or Jam Pipe Threads, Size 1/8", 1/4", 3/8", 1/2", 3/4" : Amazon.ca: Tools &](https://m.media-amazon.com/images/I/61eP5ErMrIS.jpg)
5 Piece NPT Thread Forming Taps, Pipe Taps Set, High-Speed Steel Drill Bits for Cleaning or Re-Thread Damaged or Jam Pipe Threads, Size 1/8", 1/4", 3/8", 1/2", 3/4" : Amazon.ca: Tools &
![Roof Window Pramet e7101/2 HSS Bright NPT Machine Tap Drill Straight Flute ANSI B94.1 1/2" X 14 : Amazon.de: DIY & Tools Roof Window Pramet e7101/2 HSS Bright NPT Machine Tap Drill Straight Flute ANSI B94.1 1/2" X 14 : Amazon.de: DIY & Tools](https://m.media-amazon.com/images/I/61R1-TKwkrL._AC_UF1000,1000_QL80_.jpg)