Name that locking nut

[227bhp]

Any ideas what it's called?

[GreenV8S]

Y'bd?

Is it supposed to look like that, or did it start life as a nyloc?

ETA: E-lock looks kinda similar.

Edited by GreenV8S on Thursday 2nd August 00:01

[InitialDave]

Friction ring locking nut. Try searching for U-nut or KST nut.

[Boosted LS1]

I call those aero nuts.

[227bhp]

InitialDave said:

Friction ring locking nut. Try searching for U-nut or KST nut.

It is, well done & thanks.

Boosted LS1 said:

I call those aero nuts.

Go stand in the corner.

[DrDeAtH]

Boosted LS1 said:

I call those aero nuts.

Ahem... Aerotight stiff nuts..

[tapkaJohnD]

E-lock nut? : http://www.s-h-w.net/e/locknut.html

U-nut? : https://www.monotaro.vn/g/00427386/

Misumi self-locking nut?: https://sg.misumi-ec.com/vona2/detail/221000552816...

John

[Mr2Mike]

Friction nut. This style is often used on the rear sprockets of motorcycles.

[GreenV8S]

Mr2Mike said:

Friction nut. This style is often used on the rear sprockets of motorcycles.

Is that just a flat spring that presses against the face of the thread?

[Mr2Mike]

GreenV8S said:

Is that just a flat spring that presses against the face of the thread?

AFAIK the flat "teeth" of the thin metal insert bite into the root of the thread.

[Warmfuzzies]

philidas nut

[Mr2Mike]

Warmfuzzies said:

philidas nut

A philidas nut is one piece with slots cut into it to create the locking feature.

[Warmfuzzies]

Mr2Mike said:

Warmfuzzies said:

philidas nut

A philidas nut is one piece with slots cut into it to create the locking feature.

Mostly, but not always.

http://www.philidaslimited.co.uk/ Take a look at the third nut

K

[Mr2Mike]

Warmfuzzies said:

Mostly, but not always.

http://www.philidaslimited.co.uk/ Take a look at the third nut

K

Their "MKV" nut is still a one piece design, there is no separate locking component. It looks like a variation on the common 'oval' locknut design where the top of the thread is distorted radialy (rather than axially for the other designs). The OP's fastener has a separate stainless steel washer that is staked into the top of the nut, and typically has two or three teeth that use the root of the thread for locking.