Custom bolt generator

This is a test BOLT GENERATOR. This will generate bolts of different heights and different head sizes.
4/27/16
It now will generate bolts with different widths, heights, and threads per millimeter. There are a problem though. It will not generate bolts with a width over 10 millimeters correctly. This problem can be overcome by designing a small bolt and then sizing it up with another program. If you have suggestions on how to fix this problem, or if you have other suggestions or problems, post in the comments section.