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Bud,
McMaster Carr has everything you need and they have really fast shipping.
There would be nothing wrong with using grade 8 bolts in this application.
Steve Yott
www.mcmaster.com <http://www.mcmaster.com>
From: Fot [mailto:fot-bounces@autox.team.net] On Behalf Of Bud R
Sent: Thursday, November 24, 2016 10:17 AM
To: fot <fot@autox.team.net>
Subject: Re: [Fot] Bolts and Threads
Oops the coarse thread is 14 tpi not 12.
Bud Rolofson
Extreme Parts Racing (more than just a haircut)
71TR6 CC57365 (Good 6)
71 Spitfire MK IV Race Car #3
69 Spitfire MK 3 (back up FE engine/dinghy car)
93 Minnie Winnie Race Support Vehicle
77 Z-50A Hardly Davidson Honda Mini-Trail Bike (Triumph Pit Bike)
On Nov 24, 2016, at 9:03 AM, Bud R <levilevi@comcast.net
The Collective,
I'm working on the Spitfire's traverse leaf swing spring rear suspension and
can't find locally the 7/16" fine thread (20 tpi) by 3 1/2" bolts that were
holding the vertical link and to the trunnions and to the swing spring
bushings.
I can find the right sizes in a coarse thread (12 tpi) grade 8 bolt and
thats my plan. The old ones are grade 5 or in one case a bolt with no slash
marks on top. I don't know what it is.
Do these bolts need to be fine thread for any particular reason, e.g. for
safety, torque specs, etc.? Is a grade 8 bolt a good idea where it will be
stressed with all the up and down motion with the vertical link? Too
brittle? Usually I go for grade 8 whenever possible but I've heard there are
instances where it might not be the best solution.
An aside for Thanksgiving:
My son and his wife teaching in Shanghai said the Chinese love to celebrate
American holidays (they know them from American TV and movies) but their
take on Thanksgiving is that you thank people who do nice things for you. So
they got cards from their students thanking them for teaching. Kind of a
different twist but a good one I thought.
Happy Thanksgiving to all.
Thanks,
Bud Rolofson
Extreme Parts Racing (more than just a haircut)
71TR6 CC57365 (Good 6)
71 Spitfire MK IV Race Car #3
69 Spitfire MK 3 (back up FE engine/dinghy car)
93 Minnie Winnie Race Support Vehicle
77 Z-50A Hardly Davidson Honda Mini-Trail Bike (Triumph Pit Bike)
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vlink=3Dpurple><div class=3DWordSection1><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'>Bud,<o:p></o:=
p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'>McMaster =
Carr has everything you need and they have really fast shipping. =
There would be nothing wrong with using grade 8 bolts in this =
application. <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p> </=
o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'>Steve =
Yott<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p> </=
o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'><a =
href=3D"http://www.mcmaster.com";>www.mcmaster.com</a> =
<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'><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'> =
Fot [mailto:fot-bounces@autox.team.net] <b>On Behalf Of </b>Bud =
R<br><b>Sent:</b> Thursday, November 24, 2016 10:17 AM<br><b>To:</b> fot =
<fot@autox.team.net><br><b>Subject:</b> Re: [Fot] Bolts and =
Threads<o:p></o:p></span></p></div></div><p =
class=3DMsoNormal><o:p> </o:p></p><p class=3DMsoNormal>Oops the =
coarse thread is 14 tpi not =
12.<o:p></o:p></p><div><div><div><div><div><div><div><div><div><div><p =
class=3DMsoNormal><span =
style=3D'font-family:"Helvetica",sans-serif;color:black'><br>Bud =
Rolofson<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-family:"Helvetica",sans-serif;color:black'><o:p> </o:p=
></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-family:"Helvetica",sans-serif;color:black'>Extreme Parts =
Racing (more than just a =
haircut)<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-family:"Helvetica",sans-serif;color:black'><o:p> </o:p=
></span></p></div><div><p class=3DMsoNormal>71TR6 CC57365 (Good =
6)<o:p></o:p></p></div><div><p class=3DMsoNormal><span =
style=3D'font-family:"Helvetica",sans-serif;color:black'>71 Spitfire MK =
IV Race Car #3<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-family:"Helvetica",sans-serif;color:black'>69 Spitfire MK =
3 (back up FE engine/dinghy car)<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-family:"Helvetica",sans-serif;color:black'>93 Minnie =
Winnie Race Support Vehicle <o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-family:"Helvetica",sans-serif;color:black'>77 Z-50A Hardly =
Davidson Honda Mini-Trail Bike (Triumph Pit =
Bike)<o:p></o:p></span></p></div></div><div><p class=3DMsoNormal><span =
style=3D'font-size:9.0pt;font-family:"Helvetica",sans-serif;color:black'>=
<o:p> </o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:9.0pt;font-family:"Helvetica",sans-serif;color:black'>=
<o:p> </o:p></span></p></div><p =
class=3DMsoNormal><o:p> </o:p></p></div><p =
class=3DMsoNormal><o:p> </o:p></p></div><p =
class=3DMsoNormal><o:p> </o:p></p></div><p =
class=3DMsoNormal><o:p> </o:p></p></div><p =
class=3DMsoNormal><o:p> </o:p></p></div><p =
class=3DMsoNormal><o:p> </o:p></p></div><p =
class=3DMsoNormal><o:p> </o:p></p></div><p class=3DMsoNormal =
style=3D'margin-bottom:12.0pt'><o:p> </o:p></p></div><p =
class=3DMsoNormal><o:p> </o:p></p><div><div><p class=3DMsoNormal>On =
Nov 24, 2016, at 9:03 AM, Bud R <<a =
href=3D"mailto:levilevi@comcast.net";>levilevi@comcast.net</a>> =
wrote:<o:p></o:p></p></div><p =
class=3DMsoNormal><br><br><o:p></o:p></p><blockquote =
style=3D'margin-top:5.0pt;margin-bottom:5.0pt'><div><div><p =
class=3DMsoNormal>The Collective,<o:p></o:p></p></div><div><p =
class=3DMsoNormal><o:p> </o:p></p></div><p =
class=3DMsoNormal>I’m working on the Spitfire’s traverse =
leaf swing spring rear suspension and can’t find locally the =
7/16” fine thread (20 tpi) by 3 1/2” bolts that were =
holding the vertical link and to the trunnions and to the swing =
spring bushings.<o:p></o:p></p><div><p =
class=3DMsoNormal><o:p> </o:p></p></div><div><p class=3DMsoNormal>I =
can find the right sizes in a coarse thread (12 tpi) grade 8 bolt and =
thats my plan. The old ones are grade 5 or in one case a bolt with no =
slash marks on top. I don’t know what it is.<o:p></o:p></p><div><p =
class=3DMsoNormal> <o:p></o:p></p><div><p class=3DMsoNormal>Do =
these bolts need to be fine thread for any particular reason, e.g. for =
safety, torque specs, etc.? Is a grade 8 bolt a good idea where it will =
be stressed with all the up and down motion with the vertical link? Too =
brittle? Usually I go for grade 8 whenever possible but I’ve heard =
there are instances where it might not be the best =
solution.<o:p></o:p></p></div><div><p =
class=3DMsoNormal><o:p> </o:p></p></div><div><p =
class=3DMsoNormal>An aside for =
Thanksgiving: <o:p></o:p></p></div><div><p class=3DMsoNormal>My son =
and his wife teaching in Shanghai said the Chinese love to celebrate =
American holidays (they know them from American TV and movies) but their =
take on Thanksgiving is that you thank people who do nice things for =
you. So they got cards from their students thanking them for teaching. =
Kind of a different twist but a good one I =
thought.<o:p></o:p></p></div><div><p =
class=3DMsoNormal><o:p> </o:p></p></div><div><p =
class=3DMsoNormal>Happy Thanksgiving to all.<o:p></o:p></p></div><div><p =
class=3DMsoNormal><o:p> </o:p></p></div><div><div><div><div><div><di=
v><div><div><div><div><div><p class=3DMsoNormal><span =
style=3D'font-family:"Helvetica",sans-serif'>Thanks,<br>Bud =
Rolofson<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-family:"Helvetica",sans-serif'><o:p> </o:p></span></p>=
</div><div><p class=3DMsoNormal><span =
style=3D'font-family:"Helvetica",sans-serif'>Extreme Parts =
Racing (more than just a =
haircut)<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-family:"Helvetica",sans-serif'><o:p> </o:p></span></p>=
</div><div><p class=3DMsoNormal>71TR6 CC57365 (Good =
6)<o:p></o:p></p></div><div><p class=3DMsoNormal><span =
style=3D'font-family:"Helvetica",sans-serif'>71 Spitfire MK IV Race Car =
#3<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-family:"Helvetica",sans-serif'>69 Spitfire MK 3 (back up =
FE engine/dinghy car)<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span style=3D'font-family:"Helvetica",sans-serif'>93 =
Minnie Winnie Race Support =
Vehicle <o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-family:"Helvetica",sans-serif'>77 Z-50A Hardly Davidson =
Honda Mini-Trail Bike (Triumph Pit =
Bike)<o:p></o:p></span></p></div></div><div><p class=3DMsoNormal><span =
style=3D'font-size:9.0pt;font-family:"Helvetica",sans-serif'><o:p> <=
/o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:9.0pt;font-family:"Helvetica",sans-serif'><o:p> <=
/o:p></span></p></div><p class=3DMsoNormal><o:p> </o:p></p></div><p =
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class=3DMsoNormal><o:p> </o:p></p></div><p class=3DMsoNormal =
style=3D'margin-bottom:12.0pt'><o:p> </o:p></p></div><p =
class=3DMsoNormal><o:p> </o:p></p></div></div></div></div></blockquo=
te></div><p class=3DMsoNormal><o:p> </o:p></p></div></body></html>
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