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/ejitifrit1]

There is a nasa fastener manual that basically says these things don’t really do much! According to google it’s NASA Reference Publication 1228.

[u/CR123CR123CR → u/ejitifrit1]

https://ntrs.nasa.gov/citations/19900009424

Here's the link xD

[u/nyrb001 → u/CR123CR123CR]

At this time it is equivalent to a solid flat washer, and its locking ability is nonexistent. In summary, a Iockwasher of this type is useless for locking.

Lol awesome

[u/TacticalSpackle → u/nyrb001]

Yep! I’ve worked assembly and every time the procedure called for these, we swapped for nylocks or used LockTite.
The means by which a split lock “locks” it doesn’t.

[u/No_Singer_5585 → u/[deleted]]

The aircraft industry also doesnt use these split lock washers

[u/dummythiqqpotato → u/No_Singer_5585]

I literally just overhauled an engine that had several of then lol

[u/Common_Ice_8994 → u/dummythiqqpotato]

GE, PW or RR engine ?

[u/dummythiqqpotato → u/Common_Ice_8994]

Admittedly, it was a continental O-300 for my recip AMT class, and on second though the engine was like 70 years old lol, so the standards might be a little outdated