Originally Posted by
Sy Reene
hmm.. I always thought grease would make it easier to strip the threads as less force is needed to thread a greased external thread into the receiving internal thread the same distance as an ungreased bolt. I thought most torque ratings are provided with "dry" assumption. Rule of thumb is that for wet threads (eg. grease or lubed) then reduce torque value by up to 40%.
One problem with threaded fittings is the galling of the threads. Especially with a soft metal like AL. Grease will help reduce this possibility. Additionally I always felt that a greased bolt steel less twisting stress and therefore less chance to fracture. Andy