In message <16ad10a67c6df27b6a7e5fbe13b3c...@mail.gmail.com>, dated Thu,
26 Feb 2015, Peter Tarver <ptar...@enphaseenergy.com> writes:
I question this application since, while the serrations oppose
loosening of the screw, they do not bite into the metal beneath the
head and also seem unlikely to form a gas-tight connection, allowing
degradation of the grounding/bonding interface over time.
It obviously depends on the shape of the serrations and the tightening
torque. What matters is the pressure at the junctions between the tips
of the serrations and the substrate. Serrations that are less than sharp
can still be OK because the contact area is greater, but a higher torque
may be necessary.
--
OOO - Own Opinions Only. With best wishes. See www.jmwa.demon.co.uk
When I turn my back on the sun, it's to look for a rainbow
John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK
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