[purple gas]

I read somewhere once that when engeneers design things with torque requirments the size of the fastener head is a pretty good clue as to how tight it needs to be. Small wrenches fit small bolts, small wrenches have shorter handles than larger wrenches, the length of the handle determins how much leverage or torque you can apply. So, if you use a wrench and not a socket and tighten it till you fart you'll likely be pretty close wether it be a 3/8 or 1 1/2 bolt. Sort of a built in torque limiter. There are some situations where exact torque is critical and this just sin't good enough, but it's a good guide.. Then again if you live on pickled eggs, beans & cabbage and beer you might fart just bending over.