"Mustmaker" wrote: (snip) Steam turbine casing flanges used a bolt with a
hole in it for a heater. You heated the fastener then torqued it to a
certain value, when the fastener cooled it got really tight. (snip)
^^^^^^^^^^^
Now, THAT'S an interesting and little-known fact. I suppose, by wearing
leather gloves, and preheating bolts, could get them really tight.