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I believe the =93S=94 denotes a straight thread as opposed to tapered.
________________________________
From: Healeys <healeys-bounces@autox.team.net> on behalf of John Spaur via =
Healeys <healeys@autox.team.net>
Sent: Sunday, June 2, 2024 7:13 PM
To: 'Michael Salter' <michaelsalter@gmail.com>; 'Mirek Sharp' <m.g.sharp@sy=
mpatico.ca>
Cc: healeys@autox.team.net <healeys@autox.team.net>
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:healeys-bounces@autox.team.net] On Behalf Of Michael =
Salter
Sent: Sunday, June 2, 2024 10:42 AM
To: Mirek Sharp <m.g.sharp@sympatico.ca>
Cc: healeys@autox.team.net
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.
p@sympatico.ca>> 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.
Is this some sort of standard thread or a "special"?
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kground-color: transparent;">
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<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 <healeys-b=
ounces@autox.team.net> on behalf of John Spaur via Healeys <healeys@a=
utox.team.net><br>
<b>Sent:</b> Sunday, June 2, 2024 7:13 PM<br>
<b>To:</b> 'Michael Salter' <michaelsalter@gmail.com>; 'Mirek Sharp' =
<m.g.sharp@sympatico.ca><br>
<b>Cc:</b> healeys@autox.team.net <healeys@autox.team.net><br>
<b>Subject:</b> Re: [Healeys] One for the thread guys</font>
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<p class=3D"x_MsoNormal"><span style=3D"font-size:11.0pt; font-family:"=
;Calibri",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:"=
;Calibri",sans-serif; color:#1F497D"> </span></p>
<p class=3D"x_MsoNormal"><span style=3D"font-size:11.0pt; font-family:"=
;Calibri",sans-serif; color:#1F497D">John</span></p>
<p class=3D"x_MsoNormal"><span style=3D"font-size:11.0pt; font-family:"=
;Calibri",sans-serif; color:#1F497D"> </span></p>
<p class=3D"x_MsoNormal"><b><span style=3D"font-size:11.0pt; font-family:&q=
uot;Calibri",sans-serif">From:</span></b><span style=3D"font-size:11.0=
pt; font-family:"Calibri",sans-serif"> Healeys [mailto:healeys-bo=
unces@autox.team.net]
<b>On Behalf Of </b>Michael Salter<br>
<b>Sent:</b> Sunday, June 2, 2024 10:42 AM<br>
<b>To:</b> Mirek Sharp <m.g.sharp@sympatico.ca><br>
<b>Cc:</b> healeys@autox.team.net<br>
<b>Subject:</b> Re: [Healeys] One for the thread guys</span></p>
<p class=3D"x_MsoNormal"> </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"> </p>
<div>
<div>
<p class=3D"x_MsoNormal">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:</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:"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=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:"Calibri",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. 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:"Calibri",sans-serif"> </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:"Calibri",sans-serif">From:</span></b><span style=3D"fon=
t-size:11.0pt; font-family:"Calibri",sans-serif"> Healeys <<a =
href=3D"mailto:healeys-bounces@autox.team.net"; target=3D"_blank">healeys-bo=
unces@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">heal=
eys@autox.team.net</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"> </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" 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 "special"?</span></p>
</div>
</div>
</div>
</div>
</blockquote>
</div>
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