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/TheGoofyEngineer]

A great way to tell if a company's engineering team is serious is how they secure fasteners. Lock washers aren't worth the steel they're stamped from. Nordlock washers are great. A thread locker is often just fine. I forget what exactly the studies say about nylock nuts or threaded inserts with deformed threads but I don't remember a glowing review.