Quote:
Originally Posted by T-Cut
Different tightening torques. Corrosion apart, the stud will stay put because it's tightened into the flange to a significantly higher torque than the nut requires. So, slackening the nut afterwards doesn't slacken the stud. In some situations a high strength thread locking fluid might be used. When a stud slackens with the nut it's due to corrosion 'welding' the nut on.
TC
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And brass nuts avoid this corrosion welding.--
Over many years of fighting with manifold nuts, all the ones that came off without breaking the stud I've changed to brass.
Never had a problem afterwards either.--
PS. Just spotted on Rimmers site that the do sell the brass nuts too.