Subject: Re: [Healeys] One for the thread guys

From: Harold Manifold <[email-masked]>
Date: Sun, 2 Jun 2024 08:55:01 -0700

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Michael,

It might be from the 16-UN series of threads. Definitely in the "special"
category. What a surprise! Are you able to measure the thread angle? The
16-UN series is 60 degrees.

Harold

On Sun, Jun 2, 2024 at 7:32=E2=80=AFAM Michael Salter <michaelsalter@gmail.=
com>
wrote:

> The thread on the flare nut used to secure the temperature bulb into the
> head on later 6 cylinder engines is 5/8" diameter and 16 TPI.
> Is this some sort of standard thread or a "special"?
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<div dir=3D"ltr">Michael,<div><br></div><div>It might be from the 16-UN ser=
ies of threads. Definitely=C2=A0in the &quot;special&quot; category. What a=
 surprise! Are you able to measure the thread angle? The 16-UN series is 60=
 degrees.</div><div><br></div><div><img src=3D"cid:ii_lwxq2z8p0" alt=3D"16-=
UN.JPG" width=3D"562" height=3D"490" style=3D"margin-right: 0px;"><br></div=
><div>Harold</div><div><br></div><div><br></div></div><br><div class=3D"gma=
il_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Sun, Jun 2, 2024 at 7:32=
=E2=80=AFAM Michael Salter &lt;<a href=3D"mailto:[email-masked]">m=
[email-masked]</a>&gt; wrote:<br></div><blockquote class=3D"gmail_q=
uote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,2=
04);padding-left:1ex"><div dir=3D"auto">The thread on the flare nut used to=
 secure the temperature bulb into the head on later 6 cylinder engines is 5=
/8&quot; diameter and 16 TPI.<div dir=3D"auto">Is this some sort of standar=
d thread or a &quot;special&quot;?</div></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=
r" target=3D"_blank">http://www.team.net/pipermail/healeys</a> <a href=3D"h=
ttp://autox.team.net/archive/healeys" rel=3D"noreferrer" target=3D"_blank">=
http://autox.team.net/archive/healeys</a><br>
<br>
<a href=3D"mailto:[email-masked]" target=3D"_blank">[email-masked]=
eam.net</a><br>
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<br>
</blockquote></div>

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_______________________________________________

Archive: http://www.team.net/pipermail/healeys http://autox.team.net/archive/healeys

[email-masked]
http://autox.team.net/mailman/listinfo/healeys

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From: <[email-masked]>
Date: Sun, 2 Jun 2024 12:45:01 -0400

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Bit of a stumper Mike.  Tracy tools, my go-to source for taps and dies, =
sell a tap that is 5/8=E2=80=9Dx16 with a =E2=80=9CUNS=E2=80=9D thread =
form https://www.tracytools.com/product/5-8-x-16-tpi

I am unfamiliar with UNS but believe it is the abbreviation for Unified =
National Special, suggesting it is non-standard thread.  Looks like a =
bit of a rabbit hole and I am curious to see what others find.

=20

From: Healeys <[email-masked]> On Behalf Of Michael =
Salter
Sent: Sunday, June 2, 2024 10:26 AM
To: [email-masked]
Subject: [Healeys] One for the thread guys

=20

The thread on the flare nut used to secure the temperature bulb into the =
head on later 6 cylinder engines is 5/8" diameter and 16 TPI.

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class=3DWordSection1><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-la=
nguage:EN-US'>Bit of a stumper Mike.=C2=A0 Tracy tools, my go-to source =
for taps and dies, sell a tap that is 5/8=E2=80=9Dx16 with a =
=E2=80=9CUNS=E2=80=9D thread form <a =
href=3D"https://www.tracytools.com/product/5-8-x-16-tpi">https://www.trac=
ytools.com/product/5-8-x-16-tpi</a><o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-la=
nguage:EN-US'>I am unfamiliar with UNS but believe it is the =
abbreviation for Unified National Special, suggesting it is non-standard =
thread.=C2=A0 Looks like a bit of a rabbit hole and I am curious to see =
what others find.<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-la=
nguage:EN-US'><o:p>&nbsp;</o:p></span></p><div =
style=3D'border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm'><p class=3DMsoNormal><b><span lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'>From:</span><=
/b><span lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'> Healeys =
&lt;[email-masked]&gt; <b>On Behalf Of </b>Michael =
Salter<br><b>Sent:</b> Sunday, June 2, 2024 10:26 AM<br><b>To:</b> =
[email-masked]<br><b>Subject:</b> [Healeys] One for the thread =
guys<o:p></o:p></span></p></div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><div><p class=3DMsoNormal>The =
thread on the flare nut used to secure the temperature bulb into the =
head on later 6 cylinder engines is 5/8&quot; diameter and 16 =
TPI.<o:p></o:p></p><div><p class=3DMsoNormal>Is this some sort of =
standard thread or a =
&quot;special&quot;?<o:p></o:p></p></div></div></div></body></html>
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[email-masked]

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From: Michael Salter <[email-masked]>
Date: Sun, 2 Jun 2024 13:42:26 -0400

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I don't have a 55 degree 16 TPI thread gauge but my 60 degree seems to be a
very good fit.

On Sun., Jun. 2, 2024, 12:45 p.m. , <[email-masked]> wrote:

> Bit of a stumper Mike.  Tracy tools, my go-to source for taps and dies,
> sell a tap that is 5/8=E2=80=9Dx16 with a =E2=80=9CUNS=E2=80=9D thread fo=
rm
> https://www.tracytools.com/product/5-8-x-16-tpi
>
> I am unfamiliar with UNS but believe it is the abbreviation for Unified
> National Special, suggesting it is non-standard thread.  Looks like a bit
> of a rabbit hole and I am curious to see what others find.
>
>
>
> *From:* Healeys <[email-masked]> *On Behalf Of *Michael
> Salter
> *Sent:* Sunday, June 2, 2024 10:26 AM
> *To:* [email-masked]
> *Subject:* [Healeys] One for the thread guys
>
>
>

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<div dir=3D"auto">I don&#39;t have a 55 degree 16 TPI thread gauge but my 6=
0 degree seems to be a very good fit.</div><br><div class=3D"gmail_quote"><=
div dir=3D"ltr" class=3D"gmail_attr">On Sun., Jun. 2, 2024, 12:45 p.m. , &l=
t;<a href=3D"mailto:[email-masked]">[email-masked]</a>&gt; =
wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8e=
x;border-left:1px #ccc solid;padding-left:1ex"><div lang=3D"EN-CA" link=3D"=
blue" vlink=3D"purple" style=3D"word-wrap:break-word"><div class=3D"m_-1784=
448034795734458WordSection1"><p class=3D"MsoNormal"><span style=3D"font-siz=
e:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">Bit of a stumper Mike.=
=C2=A0 Tracy tools, my go-to source for taps and dies, sell a tap that is 5=
/8=E2=80=9Dx16 with a =E2=80=9CUNS=E2=80=9D thread form <a href=3D"https://=
www.tracytools.com/product/5-8-x-16-tpi" target=3D"_blank" rel=3D"noreferre=
r">https://www.tracytools.com/product/5-8-x-16-tpi</a><u></u><u></u></span>=
</p><p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quo=
t;Calibri&quot;,sans-serif">I am unfamiliar with UNS but believe it is the =
abbreviation for Unified National Special, suggesting it is non-standard th=
read.=C2=A0 Looks like a bit of a rabbit hole and I am curious to see what =
others find.<u></u><u></u></span></p><p class=3D"MsoNormal"><span style=3D"=
font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif"><u></u>=C2=A0<=
u></u></span></p><div style=3D"border:none;border-top:solid #e1e1e1 1.0pt;p=
adding:3.0pt 0cm 0cm 0cm"><p class=3D"MsoNormal"><b><span lang=3D"EN-US" st=
yle=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">From:</=
span></b><span lang=3D"EN-US" style=3D"font-size:11.0pt;font-family:&quot;C=
alibri&quot;,sans-serif"> Healeys &lt;<a href=3D"mailto:healeys-bounces@aut=
ox.team.net" target=3D"_blank" rel=3D"noreferrer">[email-masked]=
m.net</a>&gt; <b>On Behalf Of </b>Michael Salter<br><b>Sent:</b> Sunday, Ju=
ne 2, 2024 10:26 AM<br><b>To:</b> <a href=3D"mailto:[email-masked]"=
 target=3D"_blank" rel=3D"noreferrer">[email-masked]</a><br><b>Subj=
ect:</b> [Healeys] One for the thread guys<u></u><u></u></span></p></div><p=
 class=3D"MsoNormal"><u></u>=C2=A0<u></u></p><div><p class=3D"MsoNormal">Th=
e thread on the flare nut used to secure the temperature bulb into the head=
 on later 6 cylinder engines is 5/8&quot; diameter and 16 TPI.<u></u><u></u=
></p><div><p class=3D"MsoNormal">Is this some sort of standard thread or a =
&quot;special&quot;?<u></u><u></u></p></div></div></div></div></blockquote>=
</div>

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[email-masked]

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From: John Spaur via Healeys <[email-masked]>
Date: Sun, 2 Jun 2024 12:13:04 -0700

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When I rebuilt the engine in my 1962 BT7 I cleaned the threads with a =
9/16-18NF tap. When I reinstalled the bulb I used Hylomar, possibly the =
hardening type, to seal the threads. No leaks.

=20

John

=20

From: Healeys [mailto:[email-masked]] On Behalf Of =
Michael Salter
Sent: Sunday, June 2, 2024 10:42 AM
To: Mirek Sharp <[email-masked]>
Cc: [email-masked]
Subject: Re: [Healeys] One for the thread guys

=20

I don't have a 55 degree 16 TPI thread gauge but my 60 degree seems to =
be a very good fit.

=20

On Sun., Jun. 2, 2024, 12:45 p.m. , <[email-masked] =

=20

From: Healeys <[email-masked] =
Sent: Sunday, June 2, 2024 10:26 AM
Subject: [Healeys] One for the thread guys

=20

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</o:shapelayout></xml><![endif]--></head><body lang=3DEN-US link=3Dblue =
vlink=3Dpurple><div class=3DWordSection1><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'=
>When I rebuilt the engine in my 1962 BT7 I cleaned the threads with a =
9/16-18NF tap. When I reinstalled the bulb I used Hylomar, possibly the =
hardening type, to seal the threads. No leaks.<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'=
><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'=
>John<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'=
><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><b><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'>From:</span><=
/b><span style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'> =
Healeys [mailto:[email-masked]] <b>On Behalf Of =
</b>Michael Salter<br><b>Sent:</b> Sunday, June 2, 2024 10:42 =
AM<br><b>To:</b> Mirek Sharp =
&lt;[email-masked]&gt;<br><b>Cc:</b> =
[email-masked]<br><b>Subject:</b> Re: [Healeys] One for the =
thread guys<o:p></o:p></span></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><div><p class=3DMsoNormal>I don't =
have a 55 degree 16 TPI thread gauge but my 60 degree seems to be a very =
good fit.<o:p></o:p></p></div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><div><div><p class=3DMsoNormal>On =
Sun., Jun. 2, 2024, 12:45 p.m. , &lt;<a =
href=3D"mailto:[email-masked]">[email-masked]</a>&gt; =
wrote:<o:p></o:p></p></div><blockquote =
style=3D'border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in =
6.0pt;margin-left:4.8pt;margin-right:0in'><div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-CA =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'>Bit of a =
stumper Mike.&nbsp; Tracy tools, my go-to source for taps and dies, sell =
a tap that is 5/8=E2=80=9Dx16 with a =E2=80=9CUNS=E2=80=9D thread form =
<a href=3D"https://www.tracytools.com/product/5-8-x-16-tpi" =
target=3D"_blank">https://www.tracytools.com/product/5-8-x-16-tpi</a></sp=
an><span lang=3DEN-CA><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-CA =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'>I am =
unfamiliar with UNS but believe it is the abbreviation for Unified =
National Special, suggesting it is non-standard thread.&nbsp; Looks like =
a bit of a rabbit hole and I am curious to see what others =
find.</span><span lang=3DEN-CA><o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-CA =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'>&nbsp;</span>=
<span lang=3DEN-CA><o:p></o:p></span></p><div =
style=3D'border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in'><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'>From:</span><=
/b><span style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'> =
Healeys &lt;<a href=3D"mailto:[email-masked]" =
target=3D"_blank">[email-masked]</a>&gt; <b>On Behalf Of =
</b>Michael Salter<br><b>Sent:</b> Sunday, June 2, 2024 10:26 =
AM<br><b>To:</b> <a href=3D"mailto:[email-masked]" =
target=3D"_blank">[email-masked]</a><br><b>Subject:</b> =
[Healeys] One for the thread guys</span><span =
lang=3DEN-CA><o:p></o:p></span></p></div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-CA>&nbsp;<o:p></o:p></span></p><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-CA>The thread on the flare nut used to secure the temperature =
bulb into the head on later 6 cylinder engines is 5/8&quot; diameter and =
16 TPI.<o:p></o:p></span></p><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-CA>Is this some sort of standard thread or a =
&quot;special&quot;?<o:p></o:p></span></p></div></div></div></div></block=
quote></div></div></body></html>
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[email-masked]

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From: WILLIAM B LAWRENCE via Healeys <[email-masked]>
Date: Sun, 2 Jun 2024 19:55:16 +0000

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I believe the =93S=94 denotes a straight thread as opposed to tapered.
________________________________
From: Healeys <[email-masked]> on behalf of John Spaur via =
Healeys <[email-masked]>
Sent: Sunday, June 2, 2024 7:13 PM
To: 'Michael Salter' <[email-masked]>; 'Mirek Sharp' <m.g.sharp@sy=
mpatico.ca>
Cc: [email-masked] <[email-masked]>
Subject: Re: [Healeys] One for the thread guys

When I rebuilt the engine in my 1962 BT7 I cleaned the threads with a 9/16-=
18NF tap. When I reinstalled the bulb I used Hylomar, possibly the hardenin=
g type, to seal the threads. No leaks.

John

From: Healeys [mailto:[email-masked]] On Behalf Of Michael =
Salter

I don't have a 55 degree 16 TPI thread gauge but my 60 degree seems to be a=
 very good fit.

[email-masked]>> wrote:

Bit of a stumper Mike.  Tracy tools, my go-to source for taps and dies, sel=
l a tap that is 5/8=94x16 with a =93UNS=94 thread form https://www.tracytoo=
ls.com/product/5-8-x-16-tpi

I am unfamiliar with UNS but believe it is the abbreviation for Unified Nat=
ional Special, suggesting it is non-standard thread.  Looks like a bit of a=
 rabbit hole and I am curious to see what others find.

team.net>> On Behalf Of Michael Salter
Sent: Sunday, June 2, 2024 10:26 AM
Subject: [Healeys] One for the thread guys

The thread on the flare nut used to secure the temperature bulb into the he=
ad on later 6 cylinder engines is 5/8" diameter and 16 TPI.

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<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3DWindows-1=
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</head>
<body>
<div style=3D"font-family: inherit; font-size: inherit; color: inherit; bac=
kground-color: transparent;">
</div>
<div style=3D"font-family: inherit; font-size: inherit; color: inherit; bac=
kground-color: transparent;">
I believe the =93S=94 denotes a straight thread as opposed to tapered.</div=
<hr style=3D"display:inline-block;width:98%" tabindex=3D"-1">
<div id=3D"divRplyFwdMsg" dir=3D"ltr"><font face=3D"Calibri, sans-serif" st=
yle=3D"font-size:11pt" color=3D"#000000"><b>From:</b> Healeys &lt;healeys-b=
[email-masked]&gt; on behalf of John Spaur via Healeys &lt;healeys@a=
utox.team.net&gt;<br>
<b>Sent:</b> Sunday, June 2, 2024 7:13 PM<br>
<b>To:</b> 'Michael Salter' &lt;[email-masked]&gt;; 'Mirek Sharp' =
&lt;[email-masked]&gt;<br>
<b>Cc:</b> [email-masked] &lt;[email-masked]&gt;<br>
<b>Subject:</b> Re: [Healeys] One for the thread guys</font>
<div>&nbsp;</div>
</div>
<style>
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<p class=3D"x_MsoNormal"><span style=3D"font-size:11.0pt; font-family:&quot=
;Calibri&quot;,sans-serif; color:#1F497D">When I rebuilt the engine in my 1=
962 BT7 I cleaned the threads with a 9/16-18NF tap. When I reinstalled the =
bulb I used Hylomar, possibly the hardening type,
 to seal the threads. No leaks.</span></p>
<p class=3D"x_MsoNormal"><span style=3D"font-size:11.0pt; font-family:&quot=
;Calibri&quot;,sans-serif; color:#1F497D">&nbsp;</span></p>
<p class=3D"x_MsoNormal"><span style=3D"font-size:11.0pt; font-family:&quot=
;Calibri&quot;,sans-serif; color:#1F497D">John</span></p>
<p class=3D"x_MsoNormal"><span style=3D"font-size:11.0pt; font-family:&quot=
;Calibri&quot;,sans-serif; color:#1F497D">&nbsp;</span></p>
<p class=3D"x_MsoNormal"><b><span style=3D"font-size:11.0pt; font-family:&q=
uot;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0=
pt; font-family:&quot;Calibri&quot;,sans-serif"> Healeys [mailto:healeys-bo=
[email-masked]]
<b>On Behalf Of </b>Michael Salter<br>
<b>Sent:</b> Sunday, June 2, 2024 10:42 AM<br>
<b>To:</b> Mirek Sharp &lt;[email-masked]&gt;<br>
<b>Cc:</b> [email-masked]<br>
<b>Subject:</b> Re: [Healeys] One for the thread guys</span></p>
<p class=3D"x_MsoNormal">&nbsp;</p>
<div>
<p class=3D"x_MsoNormal">I don't have a 55 degree 16 TPI thread gauge but m=
y 60 degree seems to be a very good fit.</p>
</div>
<p class=3D"x_MsoNormal">&nbsp;</p>
<div>
<div>
<p class=3D"x_MsoNormal">On Sun., Jun. 2, 2024, 12:45 p.m. , &lt;<a href=3D=
"mailto:[email-masked]">[email-masked]</a>&gt; wrote:</p>
</div>
<blockquote style=3D"border:none; border-left:solid #CCCCCC 1.0pt; padding:=
0in 0in 0in 6.0pt; margin-left:4.8pt; margin-right:0in">
<div>
<div>
<p class=3D"x_MsoNormal" style=3D""><span lang=3D"EN-CA" style=3D"font-size=
:11.0pt; font-family:&quot;Calibri&quot;,sans-serif">Bit of a stumper Mike.=
&nbsp; Tracy tools, my go-to source for taps and dies, sell a tap that is 5=
/8=94x16 with a =93UNS=94 thread form
<a href=3D"https://www.tracytools.com/product/5-8-x-16-tpi" target=3D"_blan=
k">https://www.tracytools.com/product/5-8-x-16-tpi</a></span><span lang=3D"=
EN-CA"></span></p>
<p class=3D"x_MsoNormal" style=3D""><span lang=3D"EN-CA" style=3D"font-size=
:11.0pt; font-family:&quot;Calibri&quot;,sans-serif">I am unfamiliar with U=
NS but believe it is the abbreviation for Unified National Special, suggest=
ing it is non-standard thread.&nbsp; Looks like a bit of
 a rabbit hole and I am curious to see what others find.</span><span lang=
=3D"EN-CA"></span></p>
<p class=3D"x_MsoNormal" style=3D""><span lang=3D"EN-CA" style=3D"font-size=
:11.0pt; font-family:&quot;Calibri&quot;,sans-serif">&nbsp;</span><span lan=
g=3D"EN-CA"></span></p>
<div style=3D"border:none; border-top:solid #E1E1E1 1.0pt; padding:3.0pt 0i=
n 0in 0in">
<p class=3D"x_MsoNormal" style=3D""><b><span style=3D"font-size:11.0pt; fon=
t-family:&quot;Calibri&quot;,sans-serif">From:</span></b><span style=3D"fon=
t-size:11.0pt; font-family:&quot;Calibri&quot;,sans-serif"> Healeys &lt;<a =
href=3D"mailto:[email-masked]" target=3D"_blank">healeys-bo=
[email-masked]</a>&gt;
<b>On Behalf Of </b>Michael Salter<br>
<b>Sent:</b> Sunday, June 2, 2024 10:26 AM<br>
<b>To:</b> <a href=3D"mailto:[email-masked]" target=3D"_blank">heal=
[email-masked]</a><br>
<b>Subject:</b> [Healeys] One for the thread guys</span><span lang=3D"EN-CA=
"></span></p>
</div>
<p class=3D"x_MsoNormal" style=3D""><span lang=3D"EN-CA">&nbsp;</span></p>
<div>
<p class=3D"x_MsoNormal" style=3D""><span lang=3D"EN-CA">The thread on the =
flare nut used to secure the temperature bulb into the head on later 6 cyli=
nder engines is 5/8&quot; diameter and 16 TPI.</span></p>
<div>
<p class=3D"x_MsoNormal" style=3D""><span lang=3D"EN-CA">Is this some sort =
of standard thread or a &quot;special&quot;?</span></p>
</div>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</body>
</html>

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[email-masked]

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---

From: WILLIAM B LAWRENCE <[email-masked]>
Date: Sun, 2 Jun 2024 19:57:46 +0000

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--_000_PH0PR20MB4445A3D9FA6B318C9D3E2467A5FE2PH0PR20MB4445namp_
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However the =93UN=94 denotes a unified thread which is the same as SAE.
________________________________
From: WILLIAM B LAWRENCE <[email-masked]>
Sent: Sunday, June 2, 2024 7:55 PM
To: John Spaur via Healeys <[email-masked]>; 'Michael Salter' <mich=
[email-masked]>; 'Mirek Sharp' <[email-masked]>; John Spaur <j=
[email-masked]>
Subject: Re: [Healeys] One for the thread guys

John

[email-masked]>> wrote:

--_000_PH0PR20MB4445A3D9FA6B318C9D3E2467A5FE2PH0PR20MB4445namp_
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<html>
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3DWindows-1=
252">
</head>
<body>
<div style=3D"font-family: inherit; font-size: inherit; color: inherit; bac=
kground-color: transparent;">
</div>
<div style=3D"font-family: inherit; font-size: inherit; color: inherit; bac=
kground-color: transparent;">
However the =93UN=94 denotes a unified thread which is the same as SAE.</di=
v>
<hr style=3D"display:inline-block;width:98%" tabindex=3D"-1">
<div id=3D"divRplyFwdMsg" dir=3D"ltr"><font face=3D"Calibri, sans-serif" st=
yle=3D"font-size:11pt" color=3D"#000000"><b>From:</b> WILLIAM B LAWRENCE &l=
t;[email-masked]&gt;<br>
<b>Sent:</b> Sunday, June 2, 2024 7:55 PM<br>
<b>To:</b> John Spaur via Healeys &lt;[email-masked]&gt;; 'Michael =
Salter' &lt;[email-masked]&gt;; 'Mirek Sharp' &lt;m.g.sharp@sympat=
ico.ca&gt;; John Spaur &lt;[email-masked]&gt;<br>
<b>Subject:</b> Re: [Healeys] One for the thread guys</font>
<div>&nbsp;</div>
</div>
<div>
<div style=3D"font-family:inherit; font-size:inherit; color:inherit; backgr=
ound-color:transparent">
</div>
<div style=3D"font-family:inherit; font-size:inherit; color:inherit; backgr=
ound-color:transparent">
I believe the =93S=94 denotes a straight thread as opposed to tapered.</div=
<hr tabindex=3D"-1" style=3D"display:inline-block; width:98%">
<div id=3D"x_divRplyFwdMsg" dir=3D"ltr"><font face=3D"Calibri, sans-serif" =
color=3D"#000000" style=3D"font-size:11pt"><b>From:</b> Healeys &lt;healeys=
[email-masked]&gt; on behalf of John Spaur via Healeys &lt;healeys=
@autox.team.net&gt;<br>
<b>Sent:</b> Sunday, June 2, 2024 7:13 PM<br>
<b>To:</b> 'Michael Salter' &lt;[email-masked]&gt;; 'Mirek Sharp' =
&lt;[email-masked]&gt;<br>
<b>Cc:</b> [email-masked] &lt;[email-masked]&gt;<br>
<b>Subject:</b> Re: [Healeys] One for the thread guys</font>
<div>&nbsp;</div>
</div>
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<p class=3D"x_x_MsoNormal"><span style=3D"font-size:11.0pt; font-family:&qu=
ot;Calibri&quot;,sans-serif; color:#1F497D">When I rebuilt the engine in my=
 1962 BT7 I cleaned the threads with a 9/16-18NF tap. When I reinstalled th=
e bulb I used Hylomar, possibly the hardening
 type, to seal the threads. No leaks.</span></p>
<p class=3D"x_x_MsoNormal"><span style=3D"font-size:11.0pt; font-family:&qu=
ot;Calibri&quot;,sans-serif; color:#1F497D">&nbsp;</span></p>
<p class=3D"x_x_MsoNormal"><span style=3D"font-size:11.0pt; font-family:&qu=
ot;Calibri&quot;,sans-serif; color:#1F497D">John</span></p>
<p class=3D"x_x_MsoNormal"><span style=3D"font-size:11.0pt; font-family:&qu=
ot;Calibri&quot;,sans-serif; color:#1F497D">&nbsp;</span></p>
<p class=3D"x_x_MsoNormal"><b><span style=3D"font-size:11.0pt; font-family:=
&quot;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11=
.0pt; font-family:&quot;Calibri&quot;,sans-serif"> Healeys [mailto:healeys-=
[email-masked]]
<b>On Behalf Of </b>Michael Salter<br>
<b>Sent:</b> Sunday, June 2, 2024 10:42 AM<br>
<b>To:</b> Mirek Sharp &lt;[email-masked]&gt;<br>
<b>Cc:</b> [email-masked]<br>
<b>Subject:</b> Re: [Healeys] One for the thread guys</span></p>
<p class=3D"x_x_MsoNormal">&nbsp;</p>
<div>
<p class=3D"x_x_MsoNormal">I don't have a 55 degree 16 TPI thread gauge but=
 my 60 degree seems to be a very good fit.</p>
</div>
<p class=3D"x_x_MsoNormal">&nbsp;</p>
<div>
<div>
<p class=3D"x_x_MsoNormal">On Sun., Jun. 2, 2024, 12:45 p.m. , &lt;<a href=
=3D"mailto:[email-masked]">[email-masked]</a>&gt; wrote:</p=
</div>
<blockquote style=3D"border:none; border-left:solid #CCCCCC 1.0pt; padding:=
0in 0in 0in 6.0pt; margin-left:4.8pt; margin-right:0in">
<div>
<div>
<p class=3D"x_x_MsoNormal" style=3D""><span lang=3D"EN-CA" style=3D"font-si=
ze:11.0pt; font-family:&quot;Calibri&quot;,sans-serif">Bit of a stumper Mik=
e.&nbsp; Tracy tools, my go-to source for taps and dies, sell a tap that is=
 5/8=94x16 with a =93UNS=94 thread form
<a href=3D"https://www.tracytools.com/product/5-8-x-16-tpi" target=3D"_blan=
k">https://www.tracytools.com/product/5-8-x-16-tpi</a></span><span lang=3D"=
EN-CA"></span></p>
<p class=3D"x_x_MsoNormal" style=3D""><span lang=3D"EN-CA" style=3D"font-si=
ze:11.0pt; font-family:&quot;Calibri&quot;,sans-serif">I am unfamiliar with=
 UNS but believe it is the abbreviation for Unified National Special, sugge=
sting it is non-standard thread.&nbsp; Looks like a bit
 of a rabbit hole and I am curious to see what others find.</span><span lan=
g=3D"EN-CA"></span></p>
<p class=3D"x_x_MsoNormal" style=3D""><span lang=3D"EN-CA" style=3D"font-si=
ze:11.0pt; font-family:&quot;Calibri&quot;,sans-serif">&nbsp;</span><span l=
ang=3D"EN-CA"></span></p>
<div style=3D"border:none; border-top:solid #E1E1E1 1.0pt; padding:3.0pt 0i=
n 0in 0in">
<p class=3D"x_x_MsoNormal" style=3D""><b><span style=3D"font-size:11.0pt; f=
ont-family:&quot;Calibri&quot;,sans-serif">From:</span></b><span style=3D"f=
ont-size:11.0pt; font-family:&quot;Calibri&quot;,sans-serif"> Healeys &lt;<=
a href=3D"mailto:[email-masked]" target=3D"_blank">healeys-=
[email-masked]</a>&gt;
<b>On Behalf Of </b>Michael Salter<br>
<b>Sent:</b> Sunday, June 2, 2024 10:26 AM<br>
<b>To:</b> <a href=3D"mailto:[email-masked]" target=3D"_blank">heal=
[email-masked]</a><br>
<b>Subject:</b> [Healeys] One for the thread guys</span><span lang=3D"EN-CA=
"></span></p>
</div>
<p class=3D"x_x_MsoNormal" style=3D""><span lang=3D"EN-CA">&nbsp;</span></p=
<div>
<p class=3D"x_x_MsoNormal" style=3D""><span lang=3D"EN-CA">The thread on th=
e flare nut used to secure the temperature bulb into the head on later 6 cy=
linder engines is 5/8&quot; diameter and 16 TPI.</span></p>
<div>
<p class=3D"x_x_MsoNormal" style=3D""><span lang=3D"EN-CA">Is this some sor=
t of standard thread or a &quot;special&quot;?</span></p>
</div>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</div>
</body>
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[email-masked]

--===============5313802005002465829==--

---

From: John Spaur via Healeys <[email-masked]>
Date: Sun, 2 Jun 2024 14:06:19 -0700

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I read that it is a 5/8 bolt, so I am a little uncertain now. The last time
I replaced the bulb was 11 years ago. Also, I don't recall that there was a
copper washer which would be needed. Could it be a pipe thread?

From: WILLIAM B LAWRENCE [mailto:[email-masked]] 
Sent: Sunday, June 2, 2024 12:58 PM
To: John Spaur via Healeys <[email-masked]>; 'Michael Salter'
<[email-masked]>; 'Mirek Sharp' <[email-masked]>; John
Spaur <[email-masked]>
Subject: Re: [Healeys] One for the thread guys

However the "UN" denotes a unified thread which is the same as SAE.

  _____  

Sent: Sunday, June 2, 2024 7:55 PM
To: John Spaur via Healeys <[email-masked]
Subject: Re: [Healeys] One for the thread guys 

I believe the "S" denotes a straight thread as opposed to tapered.

  _____  

From: Healeys <[email-masked]
Sent: Sunday, June 2, 2024 7:13 PM
To: 'Michael Salter' <[email-masked]
Subject: Re: [Healeys] One for the thread guys 

When I rebuilt the engine in my 1962 BT7 I cleaned the threads with a
9/16-18NF tap. When I reinstalled the bulb I used Hylomar, possibly the
hardening type, to seal the threads. No leaks.

John

From: Healeys [mailto:[email-masked]] On Behalf Of Michael
Salter
Sent: Sunday, June 2, 2024 10:42 AM
Subject: Re: [Healeys] One for the thread guys

On Sun., Jun. 2, 2024, 12:45 p.m. , <[email-masked]

Bit of a stumper Mike.  Tracy tools, my go-to source for taps and dies, sell
a tap that is 5/8"x16 with a "UNS" thread form
https://www.tracytools.com/product/5-8-x-16-tpi

I am unfamiliar with UNS but believe it is the abbreviation for Unified
National Special, suggesting it is non-standard thread.  Looks like a bit of
a rabbit hole and I am curious to see what others find.

From: Healeys <[email-masked]
Sent: Sunday, June 2, 2024 10:26 AM
Subject: [Healeys] One for the thread guys

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<o:shapedefaults v:ext=3D"edit" spidmax=3D"1026" />
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<o:shapelayout v:ext=3D"edit">
<o:idmap v:ext=3D"edit" data=3D"1" />
</o:shapelayout></xml><![endif]--></head><body lang=3DEN-US link=3Dblue =
vlink=3Dpurple><div class=3DWordSection1><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'=
>I read that it is a 5/8 bolt, so I am a little uncertain now. The last =
time I replaced the bulb was 11 years ago. Also, I don&#8217;t recall =
that there was a copper washer which would be needed. Could it be a pipe =
thread?<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'=
><o:p>&nbsp;</o:p></span></p><div><div =
style=3D'border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in'><p class=3DMsoNormal><b><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'>From:</span><=
/b><span style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'> =
WILLIAM B LAWRENCE [mailto:[email-masked]] <br><b>Sent:</b> Sunday, =
June 2, 2024 12:58 PM<br><b>To:</b> John Spaur via Healeys =
&lt;[email-masked]&gt;; 'Michael Salter' =
&lt;[email-masked]&gt;; 'Mirek Sharp' =
&lt;[email-masked]&gt;; John Spaur =
&lt;[email-masked]&gt;<br><b>Subject:</b> Re: [Healeys] One for =
the thread guys<o:p></o:p></span></p></div></div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><div><p class=3DMsoNormal><span =
style=3D'font-family:"inherit",serif'>However the &#8220;UN&#8221; =
denotes a unified thread which is the same as =
SAE.<o:p></o:p></span></p></div><div class=3DMsoNormal align=3Dcenter =
style=3D'text-align:center'><hr size=3D2 width=3D"98%" =
align=3Dcenter></div><div id=3DdivRplyFwdMsg><p =
class=3DMsoNormal><b><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif;color:black'>F=
rom:</span></b><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif;color:black'> =
WILLIAM B LAWRENCE &lt;<a =
href=3D"mailto:[email-masked]">[email-masked]</a>&gt;<br><b>Sent:</b> =
Sunday, June 2, 2024 7:55 PM<br><b>To:</b> John Spaur via Healeys &lt;<a =
href=3D"mailto:[email-masked]">[email-masked]</a>&gt;; =
'Michael Salter' &lt;<a =
href=3D"mailto:[email-masked]">[email-masked]</a>&gt;; =
'Mirek Sharp' &lt;<a =
href=3D"mailto:[email-masked]">[email-masked]</a>&gt;; =
John Spaur &lt;<a =
href=3D"mailto:[email-masked]">[email-masked]</a>&gt;<br>=
<b>Subject:</b> Re: [Healeys] One for the thread guys</span> =
<o:p></o:p></p><div><p =
class=3DMsoNormal>&nbsp;<o:p></o:p></p></div></div><div><div><p =
class=3DMsoNormal><span style=3D'font-family:"inherit",serif'>I believe =
the &#8220;S&#8221; denotes a straight thread as opposed to =
tapered.<o:p></o:p></span></p></div><div class=3DMsoNormal =
align=3Dcenter style=3D'text-align:center'><hr size=3D2 width=3D"98%" =
align=3Dcenter></div><div id=3D"x_divRplyFwdMsg"><p =
class=3DMsoNormal><b><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif;color:black'>F=
rom:</span></b><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif;color:black'> =
Healeys &lt;<a =
href=3D"mailto:[email-masked]">[email-masked]=
.net</a>&gt; on behalf of John Spaur via Healeys &lt;<a =
href=3D"mailto:[email-masked]">[email-masked]</a>&gt;<br>=
<b>Sent:</b> Sunday, June 2, 2024 7:13 PM<br><b>To:</b> 'Michael Salter' =
&lt;<a =
href=3D"mailto:[email-masked]">[email-masked]</a>&gt;; =
'Mirek Sharp' &lt;<a =
href=3D"mailto:[email-masked]">[email-masked]</a>&gt;<br>=
<b>Cc:</b> <a =
href=3D"mailto:[email-masked]">[email-masked]</a> &lt;<a =
href=3D"mailto:[email-masked]">[email-masked]</a>&gt;<br>=
<b>Subject:</b> Re: [Healeys] One for the thread guys</span> =
<o:p></o:p></p><div><p =
class=3DMsoNormal>&nbsp;<o:p></o:p></p></div></div><div><div><p =
class=3Dxxmsonormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'=
9/16-18NF tap. When I reinstalled the bulb I used Hylomar, possibly the =
hardening type, to seal the threads. No leaks.</span><o:p></o:p></p><p =
class=3Dxxmsonormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'=
>&nbsp;</span><o:p></o:p></p><p class=3Dxxmsonormal><span =
>John</span><o:p></o:p></p><p class=3Dxxmsonormal><span =
>&nbsp;</span><o:p></o:p></p><p class=3Dxxmsonormal><b><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'>From:</span><=
/b><span style=3D'font-size:110.0pt;font-family:"Calibri",sans-serif'> =
Healeys [<a =
href=3D"mailto:[email-masked]">mailto:healeys-bounces@aut=
ox.team.net</a>] <b>On Behalf Of </b>Michael Salter<br><b>Sent:</b> =
Sunday, June 2, 2024 10:42 AM<br><b>To:</b> Mirek Sharp &lt;<a =
href=3D"mailto:[email-masked]">[email-masked]</a>&gt;<br>=
<b>Cc:</b> <a =
href=3D"mailto:[email-masked]">[email-masked]</a><br><b>S=
ubject:</b> Re: [Healeys] One for the thread =
guys</span><o:p></o:p></p><p =
class=3Dxxmsonormal>&nbsp;<o:p></o:p></p><div><p class=3Dxxmsonormal>I =
don't have a 55 degree 16 TPI thread gauge but my 60 degree seems to be =
a very good fit.<o:p></o:p></p></div><p =
class=3Dxxmsonormal>&nbsp;<o:p></o:p></p><div><div><p =
class=3Dxxmsonormal>On Sun., Jun. 2, 2024, 12:45 p.m. , &lt;<a =
href=3D"mailto:[email-masked]">[email-masked]</a>&gt; =
wrote:<o:p></o:p></p></div><blockquote =
style=3D'border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in =
6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5=
.0pt'><div><div><p class=3Dxxmsonormal><span lang=3DEN-CA =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'>Bit of a =
stumper Mike.&nbsp; Tracy tools, my go-to source for taps and dies, sell =
a tap that is 5/8&#8221;x16 with a &#8220;UNS&#8221; thread form <a =
href=3D"https://www.tracytools.com/product/5-8-x-16-tpi" =
target=3D"_blank">https://www.tracytools.com/product/5-8-x-16-tpi</a></sp=
an><o:p></o:p></p><p class=3Dxxmsonormal><span lang=3DEN-CA =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'>I am =
unfamiliar with UNS but believe it is the abbreviation for Unified =
National Special, suggesting it is non-standard thread.&nbsp; Looks like =
a bit of a rabbit hole and I am curious to see what others =
find.</span><o:p></o:p></p><p class=3Dxxmsonormal><span lang=3DEN-CA =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'>&nbsp;</span>=
<o:p></o:p></p><div style=3D'border:none;border-top:solid #E1E1E1 =
1.0pt;padding:3.0pt 0in 0in 0in'><p class=3Dxxmsonormal><b><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'>From:</span><=
/b><span style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'> =
Healeys &lt;<a href=3D"mailto:[email-masked]" =
target=3D"_blank">[email-masked]</a>&gt; <b>On Behalf Of =
</b>Michael Salter<br><b>Sent:</b> Sunday, June 2, 2024 10:26 =
AM<br><b>To:</b> <a href=3D"mailto:[email-masked]" =
target=3D"_blank">[email-masked]</a><br><b>Subject:</b> =
[Healeys] One for the thread guys</span><o:p></o:p></p></div><p =
class=3Dxxmsonormal><span =
lang=3DEN-CA>&nbsp;</span><o:p></o:p></p><div><p =
class=3Dxxmsonormal><span lang=3DEN-CA>The thread on the flare nut used =
to secure the temperature bulb into the head on later 6 cylinder engines =
is 5/8&quot; diameter and 16 TPI.</span><o:p></o:p></p><div><p =
class=3Dxxmsonormal><span lang=3DEN-CA>Is this some sort of standard =
thread or a =
&quot;special&quot;?</span><o:p></o:p></p></div></div></div></div></block=
quote></div></div></div></div></div></body></html>
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