NCT issue. is this a locknut

mondeoman72

So car had a load of work done for the NCT. One job was a new track rod end (I think it's called). Parts supplies by macford.

Failed NCT due to lack of lock nut. They say it should have nylon at top. Took back to my mechanic and he swears it is the supplied nut and appropriate. Says nct does not recognise it as so, says I should complain.

Is this an appropriate lock nut folks?

SuperTortoise

That's not a locknut, a locknut has plastic on the thread to stop it vibrating loose. The plastic is usually blue in colour.

The Continental Op

Doesn't obviously look like a locknut. The most common ones look like the one in the wiki link.

Whats it a locknut for?

SuperTortoise

BTW that's a flanged nut and will not stop the nut vibrating loose.

mondeoman72

It came with the new track rod end.

mondeoman72

Im unsure of the correct name. Tie rod end or track rod end. Anyway, here is a photo off the net.

The Continental Op

Just replace it with a locknut. I have done a few DIY track rod ends replacements and the nuts were always locknuts.

The locknuts normally come with the new track rods because you are supposed to replace them every time you undo them - the locking capabilities of the plastic ring is reduced if you reuse it.

mondeoman72

We just changed it, but mechanic swears it is the supplied nut by macford and that the NCT is wrong.

Dirty Nails

https://www.boards.ie/discussion/comment/119378058#Comment_119378058

From the sixth pic it looks like a distorted thread locknut,but a poor one. The top 2 threads are closed in a small bit & grip on the stud. Use them only once.

The Continental Op

https://www.boards.ie/discussion/comment/119378140#Comment_119378140

Exactly what I thought but couldn't think of the name. The single mark on one side is what made me think of it, looks like it got stamped there to sightly deform the thread below so it locks. No way you can be sure of that now its been on and off.

mondeoman72

So folks. Very interesting answers.

I went back to the NCT today and mentioned this info. Even though my mechanic took it off again and replaced it with a spare nylon older style lock nut.

The lads were fair enough and after checking it again, passed the car. Thank feck. If it wasn't done today, it's a full retest next

Thanks for the opinions and the reasonable lads in NCt.