Cross Rod ball joint castle nut thread pitch/diameter? - Defender Source
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  #1  
Old December 5th, 2012, 12:29 PM
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Cross Rod ball joint castle nut thread pitch/diameter?

Sorry folks -

Part #10 in the diagram below:

http://www.landyzone.co.uk/lz/attach...ng-diagram.jpg

Lost the castle nut for the ball joint last night somehow. I tried 7/16 UNF as well as M12. Both too small. Tried M14 - too large. Does anyone know the thread diameter and pitch of the castle nut?
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  #2  
Old December 5th, 2012, 12:59 PM
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My best guess is M12 with 1.75 thread
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Old December 5th, 2012, 01:01 PM
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I'll try my M12 nuts again tonight, Jeff.
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Old December 5th, 2012, 01:02 PM
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Do you have aftermarket joints and did you check the diameter of the stud with a caliper? I am pretty sure that all of the joints I have seen are M12. I have a couple spares at home that I can check for you.

------ Follow up post added December 5th, 2012 01:07 PM ------

I just looked back at a previous McMaster order I placed for acorn nuts to help prevent rock rash on the threads and they were M12 with thread pitch of 1.75 (like Jeff said)
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Old December 5th, 2012, 01:08 PM
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Thanks Jeff - will try again tonight
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Old December 5th, 2012, 10:22 PM
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I must have some kind of non standard ball joints because the threads are m12 but 1.75 is too coarse. Is it possible to have ball joints with m12x1.0 or m12x.75??
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  #7  
Old December 5th, 2012, 10:34 PM
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without doing any legwork, this site has been super helpful

http://lrparts.net.ru/

it might offer a few different specs for the nuts...
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Old December 14th, 2012, 07:44 PM
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The many joys of defender ownership...here are four of them.

From left to right: m12x1.0 1.25 1.50 and 1.75.

And the winner is.... 1.50!!!! (Correction, it is 1.50!!!)

Now to buy the castle nut. What a pain!!
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  #9  
Old December 14th, 2012, 07:46 PM
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Quote:
Originally Posted by sonoronos View Post
The many joys of defender ownership...here are four of them.

From left to right: m12x1.0 1.25 1.50 and 1.75.

And the winner is.... 1.25!!!!

Now to buy the castle nut. What a pain!!
Some of the come with nyloc now if you can't find a castle.
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  #10  
Old December 14th, 2012, 07:48 PM
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Quote:
Originally Posted by leastonce View Post
Some of the come with nyloc now if you can't find a castle.
Yes, I think you are right! As you can see the ball joint has no hole for a cotter pin. Now I know why I "lost" the castle nut...there probably wasn't one there to begin with!
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Old December 14th, 2012, 08:31 PM
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Quote:
Originally Posted by sonoronos View Post

Yes, I think you are right! As you can see the ball joint has no hole for a cotter pin. Now I know why I "lost" the castle nut...there probably wasn't one there to begin with!
I do that. A lot ...
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Soapy water / KY jelly, etc. is is basically a must. Yes, good idea to remove trim panels - only takes 5 more minutes to do so.
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