Here
is an excellent tutorial on Bolted Joints:
Here is a complete "book" on Machine Design from
Doug
Wright at the ME Dept. of
http://www.boltscience.com/pages/basics1.htm
the University of Western Australia:
http://www-mdp.eng.cam.ac.uk/web/library/enginfo/textbooks_dvd_only/DAN/intro/contents.html