sharing an experience

[slappy]

[quote author=darrsi link=topic=26267.msg316573#msg316573 date=1592560073]
I think it should be mentioned that Copper Grease messes with torque settings as well, although using engine oil keeps torque settings very accurate, but it will obviously depend on what job the nut/bolt is doing for this to be taken into consideration.

Not really mate no. As mentioned threads don't provide seals any grease or oil will be either pushed out or sit in the free space in the threads.  The only time it's possible is when the bolt is going into a blind hole, but its very unusual as the grease/oil will escape past the threads. 


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Any kind of grease can affect torque values. I work on final assembly of offshore oil and gas trees, we regularly torque in excess off  600 ft lbs and we use a specialist grease on the threads. The torque values are calculated with this grease on as it does differ from a dry thread and at these high values it means the seal, which could have to cope with massive working pressures, will leak and when the tree is sat on the bottom of the ocean that could be catastrophic.