NASA fastener design manual

[NortonDommi]

Very true. Torquing to correct tension is often overlooked as well, I spent a lot of time at one job repairing the stuff-ups of a bloke we called 'Stupid Man',(he was a body builder and wanted everybody to use 'Super Man' as his nick-name),who once told me he liked to do bolts up tight and then "give them a tweak until I feel them give".
Jaws dropped at this statement and it explained why I spent so much time on my shift re-doing everything he touched.
I've also seen people torque down a fastener and just leave it instead of backing it off and re-torquing. A recent article in Engineering 360 on this subject stated that initial give occurs in 50 - 100 milliseconds so it is no trouble to do the job correctly.
I also used to win 'smoko' bets by getting fellow workers to torque by hand bolts in a torque tester with the readout covered. It was amazing how far out most were on small fasteners but good to see how close a few well experienced hands were. I had the advantage of practice using a scale.