steering wheel nut...help - Defender Source
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  #1  
Old August 29th, 2013, 04:10 PM
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steering wheel nut...help

So, based on information available on the web, I thought the nut to my steering wheel was either:

1/2" UNF (20tpi)

or

14mm x 1.5

I purchased one of each nut and tried to thread them both on. The 1/2" UNF is way too small to fit on the shaft, while the 14mm x 1.5 nut is not threading on to the shaft.

Does anyone know what the proper thread is?

This is on a 1984 Defender 90 (ROW) with the old-style steering wheel.
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  #2  
Old September 3rd, 2013, 06:01 PM
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What have you done with the original?
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Old September 3rd, 2013, 06:14 PM
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Lol...the strange thing is that the nut that I thought was the steering wheel nut isn't threading onto the steering shaft.
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Old September 4th, 2013, 02:10 PM
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Mike Hammond
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1/2 thickness nut, either 24 or 27mm I think across the flats. Maybe 22mm. Hmmm that's not really helping is it.
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Old September 23rd, 2013, 03:08 PM
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Thanks Mike,

So I took a caliper to the shaft and found the major thread diameter to be .562" or 14.2mm

I looked on the metric thread tables and found M14 too small and M15 too large.

I then looked on the SAE tables and found the following:

.562" corresponds to 9/16" - 12, 18, and 24 tpi ( or 9/16" BSP - 12 coarse, 16 fine)

Does this make sense to anyone? This is sort of killing me. Nothing on the web corroborates the use of a 9/16" thread on the steering column, yet this is what I have on my hands.

I must have misplaced the original nut, because the one I *thought* was correct is most definitely not.

A 9/16" nut has roughly 23.9mm across the flats, corresponding to 24mm, which corresponds to one of the 3 you gave
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