How much heat are Nylocs good for?

[IntrstlarOvrdrve]

I bought some stainless brake line tubing clips that came with stainless M5-.8 bolts and matching stainless Nyloc nuts. The clips mount on the frame, but my only concern is that I am running the exhaust tubing on my truck through the frame and the clips will be about 3.5" away from the pipe. It's not a high strength application but I wasn't sure how much heat the nut could take? The truck will be seeing a fair share of vibration so I don't really want the brake lines working themselves loose when I'm out on the trail.

 

[jimgood]

Bottom of this page: http://www.usfastener.com/insertlocknut.html

 

[Kevin54]

I don't think the heat from the exhaust will affect the nuts unless you are running constant red hot pipes. Nylon can take some heat. You have to take a torch to a universal joint to get the nylon lock out of it. Now if you were right up against the exhaust, or using nylon lock nuts on a muffler clamp, then that would be different. At 3 1/2" away, you will have an air barrier between the pipes and the nut. And if driving, the nut would in no way get as hot as the pipe.

 

[tony302coupe]

Try this link
https://www.google.com.au/url?sa=t&...t.html&usg=AFQjCNHNwhYeFFmzMYFqGQ1ydQxvJNPIVQ
Cheers
Tony

 

[Kevin54]

Bottom of this page: http://www.usfastener.com/insertlocknut.html

I didn't know that a Nyloc could be reused Learn something everyday. In our business, we weren't allowed to reuse them.

 

[yaidunno]

Standard nylock: 225 degrees F

 

[crewchief888]

if it's a concern, get some crimp type lock nuts

 

[IntrstlarOvrdrve]

Thanks! I would think that it stays under 250 degrees even being that close to the pipe. Guess I'll find out!

I would replace them with something else but none of the local hardware stores carry metric hardware in stainless and I don't want to order 100 of something else just to use four.

Of course I guess I could just replace the bolts with standard equivalents if it comes to it.

 

[Kevin54]

Thanks! I would think that it stays under 250 degrees even being that close to the pipe. Guess I'll find out!

I would replace them with something else but none of the local hardware stores carry metric hardware in stainless and I don't want to order 100 of something else just to use four.

Of course I guess I could just replace the bolts with standard equivalents if it comes to it.

Depending on what the application is, you could always make a locking situation by throwing thread interference into the equation. Just like a crimp style nut, you can deform the threads on a stud and create thread interference, or if you have a way, deform the threads of the nut. Chances are the Nyloc will do what you need though.

As far as reusing a Nyloc nut like I read about, chances are if heat is involved, you may not be able to reuse one as the heat would thermal form the threads after a certain period of time.

 

[LumpyMusic]

...I would replace them with something else but none of the local hardware stores carry metric hardware in stainless and I don't want to order 100 of something else just to use four.

If you have a bolt and nut supply place nearby (not Fastenal) you might just find that a box of 100 nuts from them is cheaper than 4 singles from Ace Hardware or similar. For me, it's ALWAYS worthwhile to drive across town to Copper State Bolt and Nut in Phoenix than it is to drive 1 mile to "Ace is the Place with the Expensive Hardware, Man".


Sgt Lumpy

 

[MikeF2316]

I didn't know that a Nyloc could be reused Learn something everyday. In our business, we weren't allowed to reuse them.

+1 I thought all lock nuts were supposed to be used once only. Of course I may not have always followed that advice, not that I was doing anything wrong as it turns out.

OP, just make sure none of yours have the nylon jammed in the wrong side of the nut, like this: