Nyla nuts

[Frankenkubota]

My mx5800 with fel is maybe 9 months old, appx 100 hours.

Early on I noticed a number of bolts that had what I call nyla nuts on them, none tightened, not even close.

I Looked yesterday and noticed one of the nuts had fallen off and of course disappeared.

I guess the untightened Nyla nut and and bolt act more as a pin than a fastener?

No problems, I will find a new bolt but, I wonder why they don稚 just use a pin with a cotter pin?

 

[workinonit]

By Nyla nut, are you speaking of a lock nut?

 

[4570Man]

A bolt with a lock nut is a lot more durable faster vs a pin with cotter pin that is easily snagged by brush and pulled out.

 

[workinonit]

As long as it has been run down far enough to lock. LOL.

 

[Frankenkubota]

By Nyla nut, are you speaking of a lock nut?

I guess? Lock nut? Makes sense.

These nuts came out years ago, they seem to have nylon or something on the threads which I guess acts as a lock nut?

I think they are great but, if you don’t tighten them, why use a nut.

I have probably 8-10 between the fel and bh, all the same. The nut is at least 1/8th inch from making contact, not even close to clamping down.

I don’t care but, again, if you are not going to tighten the nut, why use a nut and bolt?

I bet there is a good reason, I’m just curious.

 

[mcfarmall]

The thing that matters with a nylock nut is that there is at least 1/8" of threads protruding from the side of the nut where the nylon insert resides. If the non-inserted side of the nut contacts the workpiece before there is sufficient protrusion beyond the insert, then there will be no locking effect other than the stretch of the bolt. If this occurs, you need a longer bolt.

 

[Big Barn]

Nylon insert lock nuts are often referred to as NYLOCKS. I grew up thinking it was an actual brand name but I guess it is generic. LOL

 

[4570Man]

I guess? Lock nut? Makes sense.

These nuts came out years ago, they seem to have nylon or something on the threads which I guess acts as a lock nut?

I think they are great but, if you don’t tighten them, why use a nut.

I have probably 8-10 between the fel and bh, all the same. The nut is at least 1/8th inch from making contact, not even close to clamping down.

I don’t care but, again, if you are not going to tighten the nut, why use a nut and bolt?

I bet there is a good reason, I’m just curious.

Because short of welding it that’s the most secure way to hold the pin in place. If you take a hammer and beat the end of the bolt that’s sticking out of the nut It’ll never come off.

 

[Big Barn]

When using self locking nuts and the intent is NOT to tighten then then it is important there is adequate bolt thread length in order to engage the nylon inserts of the nut without tightening the assembly.

 

[jeff9366]

Nylock nuts hold tight after being securely tightened on bolts. After removal of nut, replacement and re-tightening two or three times will remain secure. After several removals, returns and tightenings, Nylock nut holding power is reduced and nuts must be replaced to assure security.

I used to do teletype machine repair work in the Navy in the 1960's before nylock nuts were invented. Nylock nuts, when only applied to a bolt two or three times, hold much better than all but a very few specialty lock washers.

My mx5800 with fel is maybe 9 months old, appx 100 hours.

Early on I noticed a number of bolts that had nylock nuts on them, none tightened, not even close.

I Looked yesterday and noticed one of the nuts had fallen off and of course disappeared.

This is poor assembly, either at the factory or the dealer before delivery.

 

[5030]

When using self locking nuts and the intent is NOT to tighten then then it is important there is adequate bolt thread length in order to engage the nylon inserts of the nut without tightening the assembly.

Plus one. The nut has to have threads showing to the top surface (flush with the head or slightly above the head to work properly. Nylocks or shakeproof nuts work fine when installed correctly.

Use them all the time, never an issue here.

 

[WranglerX]

NYLOCK nut....

Dale

 

[Big Barn]

Certainly not deliberate but my NYLOCKS are at eye level. LOL.

 

[KennyG]

Before the nylocks, the common method was "staking the threads". After the nut was tightened, you would take a chisel and score the threads. Very effective.

 

[JethroB]

I sometimes use a jam or double nut. A nut on a nut. It can also help cover sharp exposed bolt ends that skin the shins.

 

[Mat4644]

Developed and first widely used by the airplane industry. Many old timers still call them airplane nuts. Here's a side note on reuse.

 

[Big Barn]

Developed and first widely used by the airplane industry. Many old timers still call them airplane nuts. Here's a side note on reuse.

View attachment 669939

That was interesting. Thank you for posting.

 

[K5lwq]

Certainly not deliberate but my NYLOCKS are at eye level. LOL.

View attachment 669927

I think you need a few more fasteners. You might be missing a couple sizes. :thumbsup:

 

[WranglerX]

Developed and first widely used by the airplane industry. Many old timers still call them airplane nuts. Here's a side note on reuse.

View attachment 669939

Dont believe I've ever seen "running torque" for Nylocks..... I would guess it is the required torque to turn nut in it's free state (no bearing down on hard surface)....

Dale

 

[rangerfredbob]

I'll add in that you should NOT install a nylock nut with an impact gun of any sort (unless for final tightening), people do it at work and it drives me nuts... Nylon is a thermoplastic, what does plastic do when heated? melts, what does running a fastener in fast create? Friction... Anywho, I'm all for impacts, I've installed thousands of screws with impact guns in the last couple months and am trying to train myself to use the cordless impacts more for projects but habits are habits...

Just a note, at work what they do is use the impacts for T bolt type hose clamps that have 1/4-28 threads and nylock nuts, after using the impact once the nylon is useless, after loosened a little you can use them like normal nuts.