Are Nyloc Nuts truely locking ?

[mobiledynamics]

I've not used that many to know.....
Replaced some nuts that vibrate off without loctite on the snowblower.
Just doing some final seasonal prep before winter really kicks in.
Should I use a lil blue loctite regardless or does the nylock truely do hold for OPE applications.

 

[robin1731]

I have always had success with the nylock nuts. I have reused them but not on a critical piece.

 

[383 240z]

I think of them more as "vibration resistant" If they get warm they will loosen just like any other nut. Only locking nuts I know of are Stage 8's are saftey wired fastners. Some call pinch nuts locking, I consider them just a poor thread engagement. Keith

 

[NHBandit]

I use the crimp style whenever there is heat involved. Nylocs where heat is not an issue. In places where there's alot of vibration safety wiring is the only sure way to go. That's why it's used extensively in aircraft & racecars.

 

[Regnar]

I find that Nyloc nuts are a good one time use nut. After you run them on and off a few times they become worthless. Blue Loctite will work so will a Cotter Pin. I like Cotter Pins when I have to remove the nuts more that a few times for maintenance. Loctite can be a pain in the *** some times.

 

[shawnspeed]

http://www.nord-lock.com/products/wedge-locking/
These are not lock nuts, but they are lock washers that work...but they are spendy...and ny locks work and are alot cheaper , and easier than safety wire...I hate drilling fastners for SW/ and or cotter pins...Shawn

 

[bczygan]

Nyloc are used extensively on aircraft too, at least Ultralights and some sport aircraft. Only 3 uses recommended.

 

[theoldwizard1]

I've not used that many to know.....
Replaced some nuts that vibrate off without loctite on the snowblower.
Just doing some final seasonal prep before winter really kicks in.
Should I use a lil blue loctite regardless or does the nylock truely do hold for OPE applications.

I re-did all the nuts bolts and washers on my Toro a couple of years ago with stainless steel fasteners and I used Nylocs with no thread locker.

Check them once a year.

 

[theoldwizard1]

Nyloc are used extensively on aircraft too, at least Ultralights and some sport aircraft. Only 3 uses recommended.

If I was betting my life on it, I would use safety wire !

 

[1redTA]

I have a nyloc nut of the prop on my direct drive MasterCraft... with a cotter pin just in case

 

[tcianci]

I used ny locs extensively when fastening the fiberglass fenders on my truck. You can make them up good and snug without fear of them vibrating off. I found this important because I didn't want to stress the daylights out of the 'glass when Ifastened it

 

[jchetty]

They work great. You won't need the loctite. Nord-locks are a fantastic, albeit pricy, option.

 

[theoldwizard1]

There are all steel "locking nuts". These are made in such away that when installing them the first time the threads are slightly deformed. These are basically "one time use" nuts and should not be reused (all though I have reused them on some lawnmowers).

You can tell they are locking nuts because a couple of the "flats" on the hex have dents where a press hit them.

 

[kbs2244]

Not around high heat, otherwise on a snow blower, just fine.

The NTSB blamed reused Nyloc style (I am not sure of the brand name) for the Reno Air Races crash that killed 10 people.
They didn’t hold after being used multiple times.

But walking the driveway behind a snow blower is a far cry from cranking a highly modified P-51 around a pylon at 400 plus MPH.

 

[petee_c]

Why nyloc when you can cross thread for free?

Just kidding.

P

 

[krivasgarage]

The NTSB blamed reused Nyloc style (I am not sure of the brand name) for the Reno Air Races crash that killed 10 people.
They didn’t hold after being used multiple times.

I remembered that crash but not the report of the cause. Tragic. And sad. I thought all aircraft used safety wire on critical fasteners.

 

[kbs2244]

"I thought all aircraft used safety wire on critical fasteners. "
Regulated aircraft do.
But the racers fall into a different classification.
Basicly "self regulated."
It didn't work this time and is the reason for some deep soul searching in the group.

 

[dirtmister16]

careful with stainless ones. some of them are soo tight you can snap the bolt off without even realizing it.

ive not tried it yet, but i think next time i run across it ill take a file or reamer to it just a touch so i don't have issues. ive tried lube, don't help, just something about the stainless and nylock that just are strange.

 

[Ray-CA]

If you use the ny-lock type of nut, don't use any lock-tite. It will melt or deteriorate the nylon causing the nut to loosen.

Ray

 

[pst496]

I have used the aircraft versions for years on my drag car. Everywhere accept the engine. Suspinsion gets single use. 4link bars are an exception - those and everywhere else get multiple reuse. I have never had one back out

 

[MAYOR28]

Nyloc are used extensively on aircraft too, at least Ultralights and some sport aircraft. Only 3 uses recommended.

Military aircraft almost exclusively use mechanical locking fasteners... No nylon for anything critical.. Additionally, I believe nylon produces toxic fumes when ignited, another big no no.

 

[TennesseeZ]

The NTSB blamed reused Nyloc style (I am not sure of the brand name) for the Reno Air Races crash that killed 10 people.
They didn’t hold after being used multiple times.

I missed the NTSB report somehow, altho I'm a faithful FOX News watcher, thanks for the info. Tragic so many died due to it.