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Thank you Curt for that explanation. =20
Richard
Richard Mayor
boyracer466@gmail.com
> On May 23, 2023, at 12:28 PM, Curtis Arndt <cnaarndt@gmail.com> wrote:
>=20
> Richard,
>=20
> Great question. and an easy one to answer.=20
>=20
> The British Standards [the ONLY official source] state explicitly that =
the definition of a Whitworth fastener is one that has a 55 degree =
thread pitch angle versus the 60 degrees of UNF/UNC, ANF/ANC, and SAE =
fine and coarse and the 47-1/2 degree thread pitch of BA - British =
Association.=20
>=20
> Whitworth IS NOT defined and a fastener that uses a Whitworth sized =
hex head as both BSC British Standard Cycle and CEI Cycle Engineers =
Institute have these heads and use whitworth spanners BUT also have =
threads with a 60 degree pitch angle... hence NOT whitworth!!! Where =
does the BS [not British Standard] come from? Wikipedia, which is wrong =
on this subject, something I've tried to correct for two decades to no =
avail!
>=20
> The five most common whitworth fasteners [yes, there are more] used on =
Austin Healeys are... BSF - British Standard Fine, BSW - British =
Standard Whitworth, BSPP - British Standard Pipe Parallel, BSPT - =
British Standard Pipe Tapered and BSB - British Standard Brass. ALL have =
a 55 degree thread pitch angle. Discussion over, and anyone who says =
otherwise in WRONG! Not my opinion, just the facts as set forth by the =
British Standards, so irrefutable.
>=20
> Rant over.
>=20
> Curt Arndt
> The fastener authority for the Concours Registry.
>=20
> On Tue, May 23, 2023 at 12:01=E2=80=AFPM Ricchardd Mayor =
> I have a question for you all regarding Whitworth (55* thread pitch =
angle) fasteners. I have generally referred to both BSW and BSF as =
Whitworth fasteners. But, I have been =E2=80=9Ccorrected=E2=80=9D a =
number of times over this last year by some that say BSF is not =
Whitworth. So, is BSF Whitworth, or is it not?=20
>=20
>=20
> Richard Mayor
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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" =
class=3D"">Thank you Curt for that explanation. <div class=3D""><br =
class=3D""></div><div class=3D"">Richard<br class=3D""><div class=3D""><br=
class=3D""></div><div class=3D""><br class=3D""><div =
apple-content-edited=3D"true" class=3D"">
Richard Mayor<br class=3D""><a href=3D"mailto:boyracer466@gmail.com"; =
class=3D"">boyracer466@gmail.com</a><br class=3D""><br class=3D"">
</div>
<br class=3D""><div><blockquote type=3D"cite" class=3D""><div =
class=3D"">On May 23, 2023, at 12:28 PM, Curtis Arndt <<a =
href=3D"mailto:cnaarndt@gmail.com"; class=3D"">cnaarndt@gmail.com</a>> =
wrote:</div><br class=3D"Apple-interchange-newline"><div class=3D""><div =
dir=3D"ltr" class=3D""><div dir=3D"ltr" class=3D""><div =
class=3D"">Richard,</div><div class=3D""><br class=3D""></div><div =
class=3D"">Great question. and an easy one to answer. </div><div =
class=3D""><br class=3D""></div><div class=3D"">The British Standards =
[the ONLY official source] state explicitly that the =
definition of a Whitworth fastener is one that has a 55 degree thread =
pitch angle versus the 60 degrees of UNF/UNC, ANF/ANC, and SAE fine and =
coarse and the 47-1/2 degree thread pitch of BA - =
British Association. </div><div class=3D""><br =
class=3D""></div><div class=3D"">Whitworth IS NOT defined and a =
fastener that uses a Whitworth sized hex head as both BSC British =
Standard Cycle and CEI Cycle Engineers Institute have these heads and =
use whitworth spanners BUT also have threads with a 60 degree pitch =
angle... <b class=3D""><font size=3D"4" class=3D"">hence NOT =
whitworth!!! </font></b>Where does the BS [not British Standard] =
come from? Wikipedia, which is wrong on this subject, something =
I've tried to correct for two decades to no avail!</div><div =
class=3D""><br class=3D""></div><div class=3D"">The five most common =
whitworth fasteners [yes, there are more] used on Austin Healeys =
are... BSF - British Standard Fine, BSW - British Standard Whitworth, =
BSPP - British Standard Pipe Parallel, BSPT - British Standard Pipe =
Tapered and BSB - British Standard Brass. ALL have a 55 degree thread =
pitch angle. Discussion over, and anyone who says otherwise in =
WRONG! Not my opinion, just the facts as set forth by the British =
Standards, so irrefutable.</div><div class=3D""><br class=3D""></div><div =
class=3D"">Rant over.</div><div class=3D""><br class=3D""></div><div =
class=3D"">Curt Arndt</div><div class=3D"">The fastener =
authority for the Concours Registry.</div></div><br class=3D""><div =
class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Tue, May =
23, 2023 at 12:01=E2=80=AFPM Ricchardd Mayor <<a =
href=3D"mailto:boyracer466@gmail.com"; =
class=3D"">boyracer466@gmail.com</a>> wrote:<br =
class=3D""></div><blockquote class=3D"gmail_quote" style=3D"margin:0px =
0px 0px 0.8ex;border-left:1px solid =
rgb(204,204,204);padding-left:1ex"><div style=3D"overflow-wrap: =
break-word;" class=3D"">I have a question for you all regarding =
Whitworth (55* thread pitch angle) fasteners. I have generally =
referred to both BSW and BSF as Whitworth fasteners. But, I have been =
=E2=80=9Ccorrected=E2=80=9D a number of times over this last year by =
some that say BSF is not Whitworth. So, is BSF Whitworth, or is it =
not? <div class=3D""><br class=3D""></div><div class=3D""><br =
class=3D""><div class=3D"">
Richard Mayor<br class=3D""><a href=3D"mailto:boyracer466@gmail.com"; =
target=3D"_blank" class=3D"">boyracer466@gmail.com</a><br =
class=3D""></div></div></div></blockquote></div></div>
</div></blockquote></div><br class=3D""></div></div></body></html>=
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