See response #4
The charts you use are actually incorrect and have been rounded up to the nearest size.
For the majority of design or engineering applications,...
A 1mm pitch thread has a depth of 0.6134mm therefore the drilling size would be 2 x 0.6134 = 1.2268
This size should then be subtracted from the...
I'm also from the UK - Bournemouth to be exact. I'll pass the details of this site onto my students and see if we can swell the numbers a bit :D
Separate names with a comma.