[Healeys] Fastener Curiosity

[Kees Oudesluijs]

Hi Mike

Hybrid nuts and bolts even exist in UNF/UNC thread with metric AF 
spanner sizes. Probably the same for some UK thread patterns. I do not 
mean sizes that fit metric tools but deliberately made that way. I 
suppose it may have been caused by manufacturing USA and US products in 
"metric countries", e.g. Farmall tractors produced in France. You won't 
find these in any books/tables.

Kees Oudesluijs



Op 5-6-2020 om 15:00 schreef Michael MacLean:
> Kees,
>      I know the difference.  I have a degree in mechanical design and 
> have worked as an aerospace fastener designer.  The threads in both 
> nuts were exactly the same BSF thread.  The only difference was the 
> distance across flats were BSF/Whitworth on one set of nuts and SAE 
> across flats distance wise on the other set.  That is what surprised 
> me.  I did not know hybrid fasteners even existed, but both sets were 
> sold as fastener sets for 100-4 pedestal studs.
> Mike MacLean
>
> Sent from AT&T Yahoo Mail on Android 
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>
>     On Fri, Jun 5, 2020 at 3:33 AM, Kees Oudesluijs
>     <coudesluijs at chello.nl> wrote:
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