6mm tap drill size?

J

justride

Guest
what's size drill bit do I need to use for a 6mm tap?
Thank's
 

'Crockett

Freelance Smartass

For Metric sizes only.

Diameter of thread minus the pitch equals the tap drill size.

Example:

M6 x 1 thread

6 - 1 = 5mm tap drill size



Standard threads:

Example:

Tap drill size for 3/8-16 is 5/16.

The pitch is 1/16". (16 threads per inch or 1/16 of an inch per thread)
Diameter minus thread pitch = tap drill size.

3/8 - 1/16 = 5/16 tap drill size


For other sizes that don't work out so nicely, just use the closest drill size.
 
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