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Good point Alan, it is not at all unlikely that some of the ones I have are
from other and later models.
M
On Tue, May 5, 2026 at 11:50=E2=80=AFAM Alan Seigrist <healey.nut@gmail.com=
> wrote:
> Ive had similar issues with oddball knurled nuts here and there in the
> past. I wonder if later MGBs and Triumphs had SAE threaded guages... mig=
ht
> be the explaination
>
> On Thu, Apr 30, 2026 at 9:54=E2=80=AFPM Hank Leach via Healeys <
> healeys@autox.team.net> wrote:
>
>> Michael-unfortunately the 100 parts book does not address the
>> instruments. The later parts books do and for the BJ8 the nuts are 17H13=
04.
>> I just looked at a NOS speedo I have for the BJ8 and the thread is close=
to
>> 8-32 but it only goes on a couple of threads so it is not Unified.
>>
>> Moss catalog calls for the nuts 300-370 for BN1 to BJ7 and for the BJ8
>> its part 361-035 so they are different than earlier instrument parts. Co=
uld
>> be just the knurling as the BJs are fine knurls and others might be
>> coarser. My thought is that all of them are/sb 3BA. Here are pics of 100=
.
>> 100-6 and 3000 (BJ8) Hank
>>
>> --------------------
>>
>> From: "Michael Salter" <michaelsalter@gmail.com>
>> To: <healeys@autox.team.net>
>> Sent: April 29, 2026 at 8:33 AM PDT
>> Subject: [Healeys] Instrument clamp nuts
>> I have a collection of instrument retaining clamps and nuts but am
>> confused about the different threads on those nuts.
>> As far as I can find the thread on the studs on the Smiths/Jaeger is 3BA
>> however, I have several nuts (these are the round ones with various sort=
s
>> of knurling on the periphery) that seem to have a different thread and w=
ill
>> only go onto most of the instruments a turn or 2 before jamming.
>> Does anyone know if there is more than one thread used for these studs
>> and other then 3BA what is the other thread.
>>
>> M
>>
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>>
>>
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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,sa=
ns-serif;font-size:small">Good point Alan, it is not at all unlikely that s=
ome of the ones I have are from other and later models.</div><div class=3D"=
gmail_default" style=3D"font-family:arial,sans-serif;font-size:small"><br><=
/div><div class=3D"gmail_default" style=3D"font-family:arial,sans-serif;fon=
t-size:small">M</div></div><br><div class=3D"gmail_quote gmail_quote_contai=
ner"><div dir=3D"ltr" class=3D"gmail_attr">On Tue, May 5, 2026 at 11:50=E2=
=80=AFAM Alan Seigrist <<a href=3D"mailto:healey.nut@gmail.com";>healey.n=
ut@gmail.com</a>> wrote:<br></div><blockquote class=3D"gmail_quote" styl=
e=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);paddin=
g-left:1ex"><div dir=3D"ltr">Ive had similar issues with oddball knurled nu=
ts here and there in the past.=C2=A0 I wonder if later MGBs and Triumphs ha=
d SAE threaded guages... might be the explaination</div><br><div class=3D"g=
mail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Thu, Apr 30, 2026 at 9=
:54=E2=80=AFPM Hank Leach via Healeys <<a href=3D"mailto:healeys@autox.t=
eam.net" target=3D"_blank">healeys@autox.team.net</a>> wrote:<br></div><=
blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-l=
eft:1px solid rgb(204,204,204);padding-left:1ex"><div>Michael-unfortunately=
the 100 parts book does not address the instruments. The later parts books=
do and for the BJ8 the nuts are 17H1304. I just looked at a NOS speedo I h=
ave for the BJ8 and the thread is close to 8-32 but it only goes on a coupl=
e of threads so it is not Unified.</div>
<div>=C2=A0</div>
<div>Moss catalog calls for the nuts 300-370 for BN1 to BJ7 and for the BJ8=
its part 361-035 so they are different than earlier instrument parts. Coul=
d be just the knurling as the BJs are fine knurls and others might be coars=
er. My thought is that all of them are/sb 3BA. Here are pics of 100. 100-6 =
and 3000 (BJ8) Hank</div>
<div><br>-------------------- <br><br>From: "Michael Salter" <=
<a href=3D"mailto:michaelsalter@gmail.com"; target=3D"_blank">michaelsalter@=
gmail.com</a>> <br>To: <<a href=3D"mailto:healeys@autox.team.net"; tar=
get=3D"_blank">healeys@autox.team.net</a>> <br>Sent: April 29, 2026 at 8=
:33 AM PDT <br>Subject: [Healeys] Instrument clamp nuts </div>
<div>
<div class=3D"gmail_default" style=3D"font-family:arial,sans-serif;font-siz=
e:small">I have a collection of instrument retaining clamps and nuts but am=
confused about the different threads on those nuts.</div>
<div class=3D"gmail_default" style=3D"font-family:arial,sans-serif;font-siz=
e:small">As far as I can find the thread on the studs on the Smiths/Jaeger =
is 3BA however, I have several nuts (these are the round ones with various =
sorts of knurling on the periphery) that seem to have a different thread an=
d will only go onto most of the instruments a turn or 2 before jamming.=C2=
=A0</div>
<div class=3D"gmail_default" style=3D"font-family:arial,sans-serif;font-siz=
e:small">Does anyone know if there is more than one thread used for these s=
tuds and other then 3BA what is the other thread.</div>
<div class=3D"gmail_default" style=3D"font-family:arial,sans-serif;font-siz=
e:small">=C2=A0</div>
<div class=3D"gmail_default" style=3D"font-family:arial,sans-serif;font-siz=
e:small">M</div>
</div>
<div>=C2=A0</div>_______________________________________________<br>
rer" target=3D"_blank">http://www.team.net/donate.html</a><br>
<br>
Archive: <a href=3D"http://www.team.net/pipermail/healeys"; rel=3D"noreferre=
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ttp://autox.team.net/archive/healeys" rel=3D"noreferrer" target=3D"_blank">=
http://autox.team.net/archive/healeys</a><br>
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<br>
</blockquote></div>
</blockquote></div>
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