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imperial nut on defender radius arm ??


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hello all , 

i got my radius arms back from sandblasting and painting , so fitted the remaining parts , to keep everything together. 

i ordered new nuts (M20  NY120041)  these fit the threads but are very sloppy fit , i guess some 1-1,5 mm "play" on the threads .....this can't be right .

is it possible they fitted imperial radius arms to this 110 (1985)  ?

i'm not good at measuring imperial but it looks like 3/4" inch ...  so wat nut to order ??

 

20200501_155338.thumb.jpg.7339d83f34ff879992081944ab836b3a.jpg

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10 hours ago, Mo Murphy said:

That'll be Chinese metric then 😂

Mo

Must be the metric, they landed on the dark side of the moon with ... 😂 😅

Measure the length of 10 turns of the thread. If it is 25 mm, it is M20.

 

Edited by Sigi_H
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There are 2 different types of lower links, hollow and solid. They MUST NOT be mixed.

NTC4720 solid 

NTC8328 hollow

However there is only 1 part No for the nut

NY120041l which supercedes to NY120064

https://www.brit-car.co.uk/product.php/418550/0/nut_m20_nylock

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8 hours ago, Sigi_H said:

Must be the metric, they landed on the dark side of the moon with ... 😂 😅

Measure the length of 10 turns of the thread. If it is 25 mm, it is M20.

Except....  3/4"-UNC is 10 threads per inch.  25.4 mm for 10 threads. You need a thread gauge to tell for sure.  Regardless, 3/4" is 19 mm and that is not 19 mm.

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the threads measure 25 mm for 10 turns , so it must be M20 ...

but if the 3/4" UNC is 19 mm  , then it would be possible to retread it to 3/4 .... that would give me a tight fit without the need to look for replacement radius arms .

Are 3/4" dies affordable , or are they just as expensive as buying new radius arms , sandblast en paint en refit the bushes ?

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it is a selflocking nut , i can put it on till the plastic locking ring , and there is still a bit off play in it , don't know how far the threads project thru the nut when installed , it may get beter once the nut is on the correct spot 

 

 

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