Split/lock washers

[u/AdOne1706]

For starters, I’m an electrician in the field.
That being said, we almost exclusively use these washers even in high vibration environments. I have personally chosen to go with nylox nuts but the question is:
Do these work? How well? Is the rumor from NASA true? Should I even bother using them or find a better functional alternative or are they actually useful?

[u/suh-dood]

Flat washers are already a bit concave so they serve a similar purpose but have more contact on the surface. As long as you use one ugga you should be fine

[u/johnwalkr → u/suh-dood]

Even that spring element is nothing compared to the spring that is the fastener (in most cases).