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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:ynotink@msn.com]
Sent: Sunday, June 2, 2024 12:58 PM
To: John Spaur via Healeys <healeys@autox.team.net>; 'Michael Salter'
<michaelsalter@gmail.com>; 'Mirek Sharp' <m.g.sharp@sympatico.ca>; John
Spaur <jmsdarch@sbcglobal.net>
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 <healeys@autox.team.net
Subject: Re: [Healeys] One for the thread guys
I believe the "S" denotes a straight thread as opposed to tapered.
_____
From: Healeys <healeys-bounces@autox.team.net
Sent: Sunday, June 2, 2024 7:13 PM
To: 'Michael Salter' <michaelsalter@gmail.com
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:healeys-bounces@autox.team.net] On Behalf Of Michael
Salter
Sent: Sunday, June 2, 2024 10:42 AM
Subject: Re: [Healeys] One for the thread guys
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. , <m.g.sharp@sympatico.ca
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 <healeys-bounces@autox.team.net
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
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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</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’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> </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:ynotink@msn.com] <br><b>Sent:</b> Sunday, =
June 2, 2024 12:58 PM<br><b>To:</b> John Spaur via Healeys =
<healeys@autox.team.net>; 'Michael Salter' =
<michaelsalter@gmail.com>; 'Mirek Sharp' =
<m.g.sharp@sympatico.ca>; John Spaur =
<jmsdarch@sbcglobal.net><br><b>Subject:</b> Re: [Healeys] One for =
the thread guys<o:p></o:p></span></p></div></div><p =
class=3DMsoNormal><o:p> </o:p></p><div><p class=3DMsoNormal><span =
style=3D'font-family:"inherit",serif'>However the “UN” =
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 <<a =
href=3D"mailto:ynotink@msn.com";>ynotink@msn.com</a>><br><b>Sent:</b> =
Sunday, June 2, 2024 7:55 PM<br><b>To:</b> John Spaur via Healeys <<a =
href=3D"mailto:healeys@autox.team.net";>healeys@autox.team.net</a>>; =
'Michael Salter' <<a =
href=3D"mailto:michaelsalter@gmail.com";>michaelsalter@gmail.com</a>>; =
'Mirek Sharp' <<a =
href=3D"mailto:m.g.sharp@sympatico.ca";>m.g.sharp@sympatico.ca</a>>; =
John Spaur <<a =
href=3D"mailto:jmsdarch@sbcglobal.net";>jmsdarch@sbcglobal.net</a>><br>=
<b>Subject:</b> Re: [Healeys] One for the thread guys</span> =
<o:p></o:p></p><div><p =
class=3DMsoNormal> <o:p></o:p></p></div></div><div><div><p =
class=3DMsoNormal><span style=3D'font-family:"inherit",serif'>I believe =
the “S” 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 <<a =
href=3D"mailto:healeys-bounces@autox.team.net";>healeys-bounces@autox.team=
.net</a>> on behalf of John Spaur via Healeys <<a =
href=3D"mailto:healeys@autox.team.net";>healeys@autox.team.net</a>><br>=
<b>Sent:</b> Sunday, June 2, 2024 7:13 PM<br><b>To:</b> 'Michael Salter' =
<<a =
href=3D"mailto:michaelsalter@gmail.com";>michaelsalter@gmail.com</a>>; =
'Mirek Sharp' <<a =
href=3D"mailto:m.g.sharp@sympatico.ca";>m.g.sharp@sympatico.ca</a>><br>=
<b>Cc:</b> <a =
href=3D"mailto:healeys@autox.team.net";>healeys@autox.team.net</a> <<a =
href=3D"mailto:healeys@autox.team.net";>healeys@autox.team.net</a>><br>=
<b>Subject:</b> Re: [Healeys] One for the thread guys</span> =
<o:p></o:p></p><div><p =
class=3DMsoNormal> <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'=
>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.</span><o:p></o:p></p><p =
class=3Dxxmsonormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'=
> </span><o:p></o:p></p><p class=3Dxxmsonormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'=
>John</span><o:p></o:p></p><p class=3Dxxmsonormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'=
> </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:healeys-bounces@autox.team.net";>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 <<a =
href=3D"mailto:m.g.sharp@sympatico.ca";>m.g.sharp@sympatico.ca</a>><br>=
<b>Cc:</b> <a =
href=3D"mailto:healeys@autox.team.net";>healeys@autox.team.net</a><br><b>S=
ubject:</b> Re: [Healeys] One for the thread =
guys</span><o:p></o:p></p><p =
class=3Dxxmsonormal> <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> <o:p></o:p></p><div><div><p =
class=3Dxxmsonormal>On Sun., Jun. 2, 2024, 12:45 p.m. , <<a =
href=3D"mailto:m.g.sharp@sympatico.ca";>m.g.sharp@sympatico.ca</a>> =
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. Tracy tools, my go-to source for taps and dies, sell =
a tap that is 5/8”x16 with a “UNS” 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. 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'> </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 <<a href=3D"mailto:healeys-bounces@autox.team.net"; =
target=3D"_blank">healeys-bounces@autox.team.net</a>> <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:healeys@autox.team.net"; =
target=3D"_blank">healeys@autox.team.net</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> </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" 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 =
"special"?</span><o:p></o:p></p></div></div></div></div></block=
quote></div></div></div></div></div></body></html>
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