Electronics > Projects, Designs, and Technical Stuff

Serial port lock nuts always coming loose

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magic:
One thing which will never be retracted for screw locking because it works:

a pair of nuts locked against each other :)

dom0:
That works as long as the tension between the nuts is much greater than the tension on the bolt. The usual two-wrench technique ensures this, normally...

gibbled:
Slight marring of the male threaded portion works well, just a squeeze with a pair of pliers is sufficient.

boffin:

--- Quote from: dom0 on October 15, 2019, 11:35:50 pm ---Loctite

--- End quote ---

or, just as effective, a bottle of nail polish.  Just dab the thread before putting it in. Just enough stick to stop them from coming loose, and cheap cheap cheap

Conrad Hoffman:

--- Quote from: magic on October 16, 2019, 05:39:35 pm ---One thing which will never be retracted for screw locking because it works:

a pair of nuts locked against each other :)

--- End quote ---

This brings up the interesting case of using a regular nut plus a thin jam nut. The correct assembly order isn't what most people think.

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