Terms of Use & Disclaimer

Effective Date: 2026-08-24

1. Reference Information Only

The tables, dimensions, formulas, and tool recommendations provided on Drill Size Reference are compiled for general technical workshop reference and informational purposes only.

2. Verification for Critical Applications

While every reasonable effort has been made to cross-reference dimensions against published standards (ASME B94.11M, ASME B1.1, ISO 273, etc.), manufacturing requirements can vary significantly based on material hardness, tap style, cutting fluids, plating thickness, and machine tolerances.

For production-critical, structural, aerospace, automotive, or safety-sensitive engineering applications, all hole sizes and thread specifications must be verified against official engineering drawings, applicable governing standards, and cutting-tool manufacturer technical data.

3. Limitation of Liability

The operators of this website make no warranties, express or implied, regarding fitness for a particular manufacturing purpose or absolute mathematical perfection. Use of this reference information is at your own risk.

4. Permitted Use

You are free to bookmark, search, print, and export CSV tables from this site for personal, educational, workshop, and professional reference.