Originally submitted by Jack Klarich
The charts you will find at the linked website will show you what size drill bit to use with a tap.
Tap sizes are shown as hole size - threads per inch. Example 1/4-20 = 1/4" hole, 20 threads per inch.
Source: Tap and Drill Bit Size Chart
The charts you will find at the linked website will show you what size drill bit to use with a tap.
Tap sizes are shown as hole size - threads per inch. Example 1/4-20 = 1/4" hole, 20 threads per inch.
Source: Tap and Drill Bit Size Chart