What is effective diameter in a bolt?

Question

What is effective diameter in a bolt?

Answer 1

*EFFECTIVE DIAMETER :

This is the diameter of an imaginary cylinder coaxial with the thread, which has equal metal and space widths. It is often referred to as pitch diameter. Sometimes referred to as the simple effective diameter to differentiate from the virtual effective diameter.

*See the diagram at:

http://www.boltscience.com/pages/screw3....