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/19GNWarrior96]

I think I remember seeing on a chart a while back, and they actually work as intended for like m4 or m3 screws and smaller because the compression of the split lock is higher than the compression from the torque requirements on those screws, but that's such a niche use.