Another fun equation is that - for most practical circumstances:
T=.2Fd
Where:
T = torque
F = axial force (clamping) that is applied by the fastener during torquing
d = the nominal diameter of the fastener
The ".2" is a friction factor which is a decent approximation most of the time...
So if the fastener you are torquing to 260 ft-lbs is a 3/4" bolt, for instance, then that fastener is generating:
260 ft-lbs (12 in) = .2(F).75
F = 20800 lbs
That's a lot.
