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Michael,
As I understand your question...
The first problem is that the fasteners on 100s (BN1/2) engines are
Whitworth (55=C2=B0 thread pitch angle) BSF (British Standard Fine). As su=
ch a
3/8" BSF fastener has 20 tpi.
A 3/8 X 24 tpi fastener is a standard UNF, ANF or SAE Fine thread,
basically a US Hardware store fastener, and is totally incompatible! These
not only have a different tpi, but they are a 60=C2=B0 thread pitch angle.
-Curt
On Wed, Sep 11, 2019 at 1:59 PM Randy Hicks via Healeys <
healeys@autox.team.net> wrote:
> Received this from a friend. Can anyone help out?
>
> Randy
>
> Begin forwarded message:
>
> *From: *michael mc burney <mcb.1@comcast.net>
> *Subject: **RE: Hi Randy, I am stumped. michael.*
> *Date: *September 11, 2019 at 4:54:14 PM EDT
> *To: *Randy Hicks <randyhicks@me.com>
>
>
> Hello Randy, Hate to bother but I am stumped over a simple fastener
> problem. I am attempting to mount
> my spare BN2 block onto a engine stand. Problem is with the four
> fasteners needed to do this. I have tried
> all the bolts I think should work, but no! I thought the engine
> plate/xmission, bell housing used 3/8 by 24.
> The cap screws will thread into the block but will not tighten. Do
> you/or one in the healey nation/ happen to
> know the proper cap screw/bolt that will do the trick???
>
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<div dir=3D"ltr">Michael,<div><br></div><div>As I understand your question.=
..</div><div><br></div><div>The first problem is that the fasteners on 100s=
(BN1/2) engines are Whitworth (55=C2=B0
thread pitch angle) BSF (British Standard Fine).=C2=A0 As such a 3/8"=
BSF fastener has 20 tpi.<div><br></div><div>A 3/8 X 24 tpi fastener is a s=
tandard UNF, ANF or SAE Fine thread,=20
basically a US Hardware store fastener,
and is totally incompatible!=C2=A0 These not only have a different tpi, but=
they are a 60<span style=3D"font-size:14pt;line-height:107%;font-family:Ca=
libri,sans-serif">=C2=B0</span>=C2=A0thread pitch angle.</div><div><br></di=
v><div>-Curt</div></div></div><br><div class=3D"gmail_quote"><div dir=3D"lt=
r" class=3D"gmail_attr">On Wed, Sep 11, 2019 at 1:59 PM Randy Hicks via Hea=
leys <<a href=3D"mailto:healeys@autox.team.net";>healeys@autox.team.net</=
a>> wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0p=
x 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><d=
iv style=3D"overflow-wrap: break-word;">Received this from a friend. Can an=
yone help out?<div><br></div><div>Randy<br><div><br><blockquote type=3D"cit=
e"><div>Begin forwarded message:</div><br class=3D"gmail-m_3276821007699913=
300Apple-interchange-newline"><div style=3D"margin:0px"><span style=3D"font=
-family:-webkit-system-font,"Helvetica Neue",Helvetica,sans-serif=
;color:rgb(0,0,0)"><b>From: </b></span><span style=3D"font-family:-webkit-s=
ystem-font,"Helvetica Neue",Helvetica,sans-serif">michael mc burn=
ey <<a href=3D"mailto:mcb.1@comcast.net"; target=3D"_blank">mcb.1@comcast=
.net</a>><br></span></div><div style=3D"margin:0px"><span style=3D"font-=
family:-webkit-system-font,"Helvetica Neue",Helvetica,sans-serif;=
color:rgb(0,0,0)"><b>Subject: </b></span><span style=3D"font-family:-webkit=
-system-font,"Helvetica Neue",Helvetica,sans-serif"><b>RE: Hi Ran=
dy, I am stumped. michael.</b><br></span></div><div style=3D"margin:0px"><s=
pan style=3D"font-family:-webkit-system-font,"Helvetica Neue",Hel=
vetica,sans-serif;color:rgb(0,0,0)"><b>Date: </b></span><span style=3D"font=
-family:-webkit-system-font,"Helvetica Neue",Helvetica,sans-serif=
">September 11, 2019 at 4:54:14 PM EDT<br></span></div><div style=3D"margin=
:0px"><span style=3D"font-family:-webkit-system-font,"Helvetica Neue&q=
uot;,Helvetica,sans-serif;color:rgb(0,0,0)"><b>To: </b></span><span style=
=3D"font-family:-webkit-system-font,"Helvetica Neue",Helvetica,sa=
ns-serif">Randy Hicks <<a href=3D"mailto:randyhicks@me.com"; target=3D"_b=
lank">randyhicks@me.com</a>><br></span></div><br><div><div style=3D"over=
flow-wrap: break-word;"><div><br></div><div>=C2=A0 =C2=A0 Hello Randy, Hate=
to bother but I am stumped over a simple fastener problem. I am attempting=
to mount</div><div>=C2=A0 =C2=A0 my spare BN2 block onto a engine stand. P=
roblem is with the four fasteners needed to do this. I have tried</div><div=
>=C2=A0 =C2=A0 all the bolts I think should work, but no! I thought the eng=
ine plate/xmission, bell housing used 3/8 by 24.</div><div>=C2=A0 =C2=A0 Th=
e cap screws will thread into the block but will not tighten. Do you/or one=
in the healey nation/ happen to</div><div>=C2=A0 =C2=A0 know the proper ca=
p screw/bolt that will do the trick???=C2=A0</div></div></div></blockquote>=
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