[quote=Dogboy]It's not [i]that[/i] sensitive. Use good judgement and make the nut snug and you will be fine using a stainless nyloc nut. Just don't go looking up torque values for 3/8" bolts, grabbing a torque wrench, and thinking you need to tighten the nut to 20 to 30 ft-lb. All the nut is doing is keeping the bolt from dropping out.
The problem with using the nylon nuts, as you discovered, is that the nylon will eventually dry out and crack over time causing the nut to fall off - also a bad situation.
I would use a stainless nyloc and call it a day.
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