"Carroll Smith's book" - that's what I said - NASA or some similar
organization!
Derek
Tim Osborne wrote:
> I remember reading something like this in Carroll Smith's fastener book....
> Not the first time the wheel has been re-engineered.
>
> tim
>
> -----Original Message-----
> From: Roger Sieling [mailto:sarl45@hotmail.com]
> Sent: Monday, August 21, 2000 8:06 PM
> To: derek.lola@sympatico.ca; vintage-race@autox.team.net
> Subject: Re: Screw Threads (was BSP to NPT fittings)
>
> Now look who's calling whom a Ludite.
>
> >From: Derek Harling <derek.lola@sympatico.ca>
> >Reply-To: Derek Harling <derek.lola@sympatico.ca>
> >To: vintage-race@autox.team.net
> >Subject: Screw Threads (was BSP to NPT fittings)
> >Date: Mon, 21 Aug 2000 20:54:30 -0400
> >
> > > NO! BSP and NPT do NOT have the same Threads per Inch.
> > > I think that the English just
> > > went one thread off to confuse us over here.
> >
> >Reminds of the recent research by NASA (or some similar organization)
> >into improved thread shape for high stress bolt applications. SAE Grade
> >8 etc obviously didn't make it; some of you maybe surprised to find
> >neither AS not MS made it - they actually recommended a "new" thread
> >form which to all intents and purposes was the same as good old
> >Whitworth! The 19th century strikes back.
> >
> >I'm sure I got the gist of the story right - maybe someone can correct
> >the details.
> >
> >Derek
> >
>
> ________________________________________________________________________
|