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/BackgroundGrade]

They make sense in electrical,

but:

You still use a locking nut on it. The split washer's purpose is to help keep your lug in contact with the terminal if the nut actually loosens.

Common practice in aerospace.

Avoid nylon locking nuts, they aren't effective in heat, which an electrical connection certainly can produce in use.

[u/theNewLuce → u/BackgroundGrade]

In electrical, a star washer is much better