I ' ve never heard of those terms either . This is not directly related , but in structural applications there is a difference between snug tight and pretensioned bolts . The AISC steel construction manual says snug tight is basically as tight as a typical iron worker can get the joint with a spud wrench . Who knows what that actually means . Then the joint is pretensioned with one of three methods turn of the nut , daily testing with a SkidmoreWilhelm machine , or direct tension indicators DTIs . But , this is all for structural , not automobiles so it doesn ' t really apply . I ' m curious what they mean by these terms as well . I wish I had the answer . <| sep |> But so much jet lag on the way back from holidays in Portugal Kappa .