![IRWIN Drill And Tap Set, 1/4-Inch - 20 NC Tap and 13/64-Inch Drill Bit (80230) : Amazon.sg: DIY & Tools IRWIN Drill And Tap Set, 1/4-Inch - 20 NC Tap and 13/64-Inch Drill Bit (80230) : Amazon.sg: DIY & Tools](https://m.media-amazon.com/images/I/71aygSBVzVL._AC_UF1000,1000_QL80_.jpg)
IRWIN Drill And Tap Set, 1/4-Inch - 20 NC Tap and 13/64-Inch Drill Bit (80230) : Amazon.sg: DIY & Tools
![Amazon.com: IRWIN Drill And Tap Set, 1/4-Inch - 20 NC Tap and 13/64-Inch Drill Bit (80230) : Industrial & Scientific Amazon.com: IRWIN Drill And Tap Set, 1/4-Inch - 20 NC Tap and 13/64-Inch Drill Bit (80230) : Industrial & Scientific](https://m.media-amazon.com/images/I/71aygSBVzVL.jpg)
Amazon.com: IRWIN Drill And Tap Set, 1/4-Inch - 20 NC Tap and 13/64-Inch Drill Bit (80230) : 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
![1/4"-20 UNC HSS-PM Roll Tap, 0.255" Shank x 0.858" Thread Length, 3XD, Mod. Bottoming, GH6, TiCN Coated 1/4"-20 UNC HSS-PM Roll Tap, 0.255" Shank x 0.858" Thread Length, 3XD, Mod. Bottoming, GH6, TiCN Coated](https://www.haascnc.com/content/dam/haascnc/ecommerce/03-1894/hero.jpg/_jcr_content/renditions/cq5dam.web.1280.1280.jpeg)
1/4"-20 UNC HSS-PM Roll Tap, 0.255" Shank x 0.858" Thread Length, 3XD, Mod. Bottoming, GH6, TiCN Coated
Tap Drill Sizes For Forming Taps Tap Drill Sizes For Forming Taps | PDF | Cutting Tools | Building Materials
![6Pcs Hexagonal Shank HSS Drill Tapping Chamfer Three-in-one Composite Tap Set M3 M4 M5 M6 M8 M10 Machine Spiral Metric Tap Bit - AliExpress 6Pcs Hexagonal Shank HSS Drill Tapping Chamfer Three-in-one Composite Tap Set M3 M4 M5 M6 M8 M10 Machine Spiral Metric Tap Bit - AliExpress](https://ae01.alicdn.com/kf/Hbbc451c0eb8f440bbe0a42f1a3a6aa8fn/6Pcs-Hexagonal-Shank-HSS-Drill-Tapping-Chamfer-Three-in-one-Composite-Tap-Set-M3-M4-M5.jpg)
6Pcs Hexagonal Shank HSS Drill Tapping Chamfer Three-in-one Composite Tap Set M3 M4 M5 M6 M8 M10 Machine Spiral Metric Tap Bit - AliExpress
![fastener - What size hole should be drilled for an individual tap? - Motor Vehicle Maintenance & Repair Stack Exchange fastener - What size hole should be drilled for an individual tap? - Motor Vehicle Maintenance & Repair Stack Exchange](https://i.stack.imgur.com/Dibur.png)