- Joined
- Feb 17, 2013
- Messages
- 4,407
Metric threads are specified by diameter and distance between threads, so it's a simple matter of subtracting one from the other. Inch threads are specified by diameter and pitch. You need to take the inverse of the pitch to get the distance between threads ... an added mathematical step, and one more opportunity for error. Not to mention having to convert fractions to decimals, etc.