Drill Size Reference Chart for Number and Letter Gauges

Drill Bit Letter Size Chart Template - Customizable - Google Docs

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A letter drill bit size chart is different from other types of drill bit size charts because it uses letter designations (such as A, B, C, etc.) to indicate the size of the drill bit, rather than numerical measurements or fractions. This type of chart is commonly used in the United States and is particularly useful for quickly identifying drill bit sizes in a standardized and easy-to-understand format. 

Find all the essential information you need for your drilling projects in this free drill bit letter chart. This convenient reference document provides drill size, diameter in inches and millimeters, overall length, and carded part number for each lettered drill bit size.

Key Elements

  • Drill Size: This refers to the size of the drill bit, indicated by a letter from A to Z, with each letter corresponding to a specific diameter size.
  • Diameter (in): This indicates the diameter of the drill bit in inches, showing the size of the hole it will drill.
  • Diameter (mm): This indicates the diameter of the drill bit in millimeters, providing a metric measurement for the size of the hole.
  • Overall Length: This refers to the total length of the drill bit, which is important for compatibility with different types of drilling machines and projects.
  • Carded Part No.: This is the part number assigned to the drill bit for easy identification and replacement, particularly useful when purchasing new drill bits.

Suitable For

  • It is ideal for workshops, construction sites, and DIY enthusiasts
  • It is suitable for a wide range of drilling projects, from small home projects to large construction jobs

Format

  • This chart is available as a printable chart for easy reference
  • It is available in ODT, DOCX, and DOTX formats for easy editing and customization
  • It is also available in Google Docs format for online collaboration.

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.