Gerhard Junker back in 1969 studied those split-ring lock washers you get in assembly packages and found they really didn’t work. Actually, he found the lock washers made the bolts get looser faster.
So why do they still make them? Got us by the sneakers.
Some of your comments make me laugh, because they are true but this one, no one complains but we all groan when we see them, so now I wonder why do they keep making them?
A really good question. Why do they keep making them?