This free chart includes essential information such as screw size, major diameter, threads per inch, and drill sizes for various materials. You can use this chart to find the right drill sizes for both close fit and free fit applications, as well as for 75% and 50% thread engagement when working with materials such as aluminum, brass, plastics, steel, stainless steel, or iron.
Key Elements
- Screw Size: This provides compatibility by indicating the screw size that matches each drill size.
- Major Diameter: This indicates the screw threads’ major diameter, which aids in choosing the appropriate drill size for tapping or clearance holes.
- Threads Per Inch: This helps with proper drill selection by showing the number of threads per inch for threaded screws.
- Minor Diameter: This describes the screw threads’ minor diameter and is helpful in figuring out the right drill size for tapping or clearance holes.
- 75% Thread for Softer Materials: This gives the drill size needed to achieve a 75% thread engagement in materials that are softer, such as brass, plastic, and aluminum.
- 50% Thread for Steel, Stainless & Iron: This describes the size of the drill needed to achieve 50% thread engagement in materials that are harder, like iron, steel, and stainless steel.
- Close Fit Drill Size: This specifies the drill size used to create holes that are a close fit for screws to ensure a secure connection.
- Free Fit Drill Size: This specifies the drill size for creating holes with a looser screw fit for making assembly and disassembly easier.
Suitable For
- This chart is suitable for a wide range of drilling projects.
- It is ideal for workshops, construction sites, and DIY enthusiasts.
Format
- The chart is available in PDF, DOCX, DOTX, ODS, and Google Docs formats.
- It is easy to print and use on-the-go.
Disclaimer: The chart has been assembled with thorough research and best of our knowledge. We do not accept any liability for errors or inaccuracies in the given chart.
