Posted by John Seidts [172.68.78.7] on Wednesday, August 30, 2017 at 22:58:52 :
In Reply to: Star washers, what's their story? posted by jim lee [108.162.246.236] on Wednesday, August 30, 2017 at 17:20:47 :
From Wikipedia:
"Tooth lockwashers are also used for ground bonding where a metal lug or object must be electrically bonded to a surface. The teeth of the washer cut through surface oxides, paints or other finishes and provide a gas-tight conductive path. In these applications the washer is not placed under the head of the screw (or under the nut), it is placed between the surfaces to be bonded. In such applications, the tooth washer does not provide any anti-rotation locking features."
When I owned my WC-53's, I asked a radio guy about them. As was explained to me by the old-time ham, everything vibrates in a vehicle. This vibration causes minor electrical currents, and thus magnetic waves, and can then create radio waves which interfere with any radio reception or transmission. The radial pattern of the washer causes the signal to go out in an even pattern; uneven patterns cause interference with transmitted radio waves. From what I learned in Physics and Gauss's Law, this makes sense.