A little premature, but I may be looking at getting the vector nut and bold library created by Kevin Hulsey.
This looks like it could be a huge time saver.
A couple of questions though. These don't look to be isometric as they look to have perspective, and are available at various angles. How would I prepare the rest of my illustration in order to make use of these fasteners. For example, if I use the the nut and bolt created at 40°, is that 40° from the horizontal? The other thing I'm not sure of is the level of perspective. Would I just have to scale, rotate and skew until it "looked" right? Or perhaps these are meant more for an exploded view?
http://www.automotiveillustrations.com/ ... bolts.html