1cm Bolt, Nut, and Screw

In the absence of an easy way to generate a bolt with both a gear-shaped thread and a diameter and thread angle I decided to let the thread script generate something "reasonably metric".

The bolts have a diameter of 10cm and thread spacing of 2mm. Rather than gear-shaped (which has a number of mechanical advantages but which I don't have a script to do all the work for me) the threads are triangle shaped.

The nut has been scaled up a few percent laterally, which hopefully will make it wor