LocTite Blue or Nylon Lock Nut?

[Bull]

Which of these do you think would be less likely to come loose over time? I drilled out two rivets holding a window regulator track so I could replace the broken plastic sliders with new ones. For reassembly I will use a nut and bolt with Loctitie blue or a nylon lock nut. The door panels on these cars are a pain to take off so I'd like for the bolt not to come loose down the road. Which would you choose to go with?

 

[zkling]

For you application, not much difference. However I will say this, you do NOT want loctite to come into contact with plastic compoentns. It will case the plastic to dry out and become brittle. If the threads pass through any type of plastic I would use the nylock nuts. If it is all steel, then the blue loctite.

Additionally, if you do use the nylock, make sure it is a new one.

 

[WhyMe]

blue backed up with a washer should last long. also the nylon ones are thicker than a flat washer

 

[RBailey]

Loctite blue for sure, it has a much higher cycle life than a nyloc.

http://sds.loctite.com/us/content_data/166733_LT4985_Threadlocking_Guide_032010_Web.pdf

 

[hofferwood]

Blue------if it's for you

Red------for someone you dread

 

[tjmonsen5]

Loctite blue for sure, it has a much higher cycle life than a nyloc.

http://sds.loctite.com/us/content_data/166733_LT4985_Threadlocking_Guide_032010_Web.pdf

I'm really surprised by that actually. Figured nylon would hold much stronger than Loctite.,

 

[Goon]

I repaired my power lock actuator on my Grand Marquis with a stainless bolt and nylon locknut. It was held on by a U-bracket that had one rivet pinning it too the door. The rivet broke and the actuator was just rattling around when the power locks were used.

The power locks get activated almost every day multiple times a day and that bolt and nut is just as tight as the day in put it on. It will outlast the car. I recommend it.

 

[devilsnight]

^ this graph brought to you by loctite, lol! I dono, I've never seen a nylock nut spin itself loose before. find it hard to believe it would. Loctite works just as well though.

 

[jonathan75]

I'm really surprised by that actually. Figured nylon would hold much stronger than Loctite.,

^ this graph brought to you by loctite, lol! I dono, I've never seen a nylock nut spin itself loose before. find it hard to believe it would. Loctite works just as well though.

They don't say if they use Blue or Red on the test. I bet they used red for best results which could be why it is red on the chart. But yeah I wouldn't put a lot of trust in their own marketing either.

 

[redwrench60]

Blue loctite. It seals threads against corrosion, holds strong and is hand tool removable. I sound like a damn commercial. Anyway, blue lock sauce gets my nod.

 

[gsmornot]

Why not go back with rivets? I understand the ease of dis-assembly later but if its not going to be done often and it worked until now, why change the design? Not saying I would not do the same thing but curious is all. As for the blue vs nyloc I would use what I had on hand and right now I have blue. I keep a bin of loose nuts and bolts and whatever else I keep from loose hardware so I might have both but I know for sure blue is in the drawer.

 

[Smiliesafari]

I tack weld a nut (usually 1/4- 20) the regulator. Then bolt the regulator in place. They never come loose.

 

[mayhemman]

id use a lock nut, non nylock. you will have vibration in a door. i wouldn't only depend on loctite, use loctite in conjunction with your fasteners.

 

[tomshep]

I LOVE nylock nuts. Found them back when I raced moto-x and they were the only thing that would stay on the bike. I use them all the time instead of Loctite. I only use Loctite on blind holes.

Tom

 

[SuzukiGS750EZ]

If it tells you anything, we use nylon nuts on our race car, sometimes in areas you wouldn't think. They don't come lose, loctite is nice and all, but a nylon nut isn't going to loosen up.

 

[rockchucker]

If you are questioning it I agree that you should use a Steel Locknut. A real Locknut...

 

[rlitman]

For you application, not much difference. However I will say this, you do NOT want loctite to come into contact with plastic compoentns. It will case the plastic to dry out and become brittle. If the threads pass through any type of plastic I would use the nylock nuts. If it is all steel, then the blue loctite.

Additionally, if you do use the nylock, make sure it is a new one.

The loctite you get at the hardware store (either Loctite brand, or Permatex) contains solvents that are bad for plastic and paints. However, this is not a reason to avoid anaerobic thread lockers.

I was recently talking with my optician about blue loctite, and he mentioned that he buys a special solvent safe version. Hardware store blue would dissolve the lacquer coating on metal glasses, or damage the plastic, but this kind is ok.

There are now also dry solvent-free formulations of loctite. One is applied like teflon tape. Another is the "lipstick" style.

All of these are better than nyloc. Not that I dislike nyloc. It has it's place too.