> LUBRICATE first 3 thread with graphite-based lubricant A dry lubricant, like graphite or molybdenum, would be better than oil, which holds on to dust. Around the workshop I try not to use too much oil. Maybe a squirt of CRC or WD-40 here and there I'd have thought the elasticity of the wheel hub would keep the nut firmly in place, but if it did come loose then oil might just help it come off further. Unless the oil is full of grit, jamming the threads You'd have to assume that the major manufacturers et al have done safety tests. Wanting to avoid people being killed and whatnot. Their recommendations are probably sound --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .