MODRATEC Useful Data (otherwise known as MUD) is a series of pages containing helpful information particularly relevant to rail modellers. The tables on this page use our easy-to-compare format to show drill diameters of standard size imperial, number, letter, and metric drill bits.

®

Printer-friendly

Comparative Standard Drill Sizes

The tables below show the comparative size of standard drill bits.

• Imperial 1/64" to 1/2"
• Number 1 to 80
• Letter A to Z
• Metric 0.20mm to 12.70mm

Revised and extended 09-Nov-2003.

Tell us about an error.

^Top

For affordable and effective Web Hosting, MODRATEC uses and recommends Hosting Bay

I am a signalling enthusiast and thoroughly enjoyed playing with SigScribe, mainly using it to design a locking frame for my previous layout. Thank you for making such a fascinating product available. (Ian)