How A Bolt Works
http://home.jtan.com/~joe/KIAT/kiat_1.htm

The Nuts and Bolts of Bolting
http://home.jtan.com/~joe/KIAT/kiat_2.htm

Torque Wrenches- How Good Are They?
http://home.jtan.com/~joe/KIAT/kiat_3.htm