Rich,

On Wed, 20 Jun 2007 00:20:19 -0400, Rich wrote:

> I once had a jaguar that had English, Metric and Wentworth standards.  It 
> was a (joy) maintaining it.  I don't hear much about Wentworth these days. 
> The Jag was a classic that I restored, 1952 Silverton roadster.  It took 16 
> quarts of oil and had 16 inch tires.  Do you know if Wentworth is still 
> around?

As has already been said, it's "Whitworth", but I'd be *really* surprised if it had anything Metric on it.  I started work on cars when I was about 10, 
and I didn't encounter anything Metric on a British car before those made in about 1970.  Before that threads were UNF and UNC (unified coarse and 
fine) and BSW (British Standard Whitworth).  UNx nuts and bolts used "AF" (Across Flats) spanners, while BSW used Whitworth spanners, which I 
believe were sized avvording to the diameter of the thread, so a 1/2" AF open-ended spanner was 0.5" across its mouth, whereas a 1/2"W spanner 
was much larger.

I believe Metric spanners are also measured across the flats, so a 13mm spanner will work on a 1/2" UNx bolt if it's not done up too tightly! :-)

Cheers,



Howard Winter
St.Albans, England


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