Thread sizes 89 RR ?

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Wafty - 04 Dec 2006 19:35 GMT

Hi ,

How do I figure out what thread a particular bolt is ? For example,
the rear bumper captive nuts look like metric ( coarse thread ) but
metric bolts don't fit. I could buy a thread gauge but I thought only
UNF and metric were used.

thanks, Wafty

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Dougal - 04 Dec 2006 20:01 GMT

> Hi ,
>
[quoted text clipped - 4 lines]
>
> thanks, Wafty

I'll avoid the difficult general question - but I think that the bolts
that you specifically mention have always been 3/8"-24 UNF. Assuming
that no-one has been there before you.

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JD - 04 Dec 2006 20:39 GMT

> Hi ,
>
[quoted text clipped - 4 lines]
>
> thanks, Wafty

A thread gauge is the only sure answer. The Rangerover classic was
originally built with all Unified (UNF and UNC) threads, (except for some
Whitworth and BSF) and through its production life gradually replaced these
with metric - but the replacement process was by no means complete by the
end of production.
JD

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