Subject: Re: [TR] Grade 2 lock nuts

From: DAVID MASSEY <[email-masked]>
Date: Fri, 14 May 2021 11:53:20 +0000 (UTC)

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 I wouldn't use anything lower than Grade 5.=C2=A0 I used some common hardw=
are store (Grade 2) bolts and nuts on my MGB driveshaft once=C2=A0 and they=
 lasted less than a month.=C2=A0 This was a long time ago and I was still l=
earning.
=20
Dave=20

=20
=20
-----Original Message-----
From: Sujit Roy <[email-masked]>
To: Triumphs <[email-masked]>
Sent: Fri, May 14, 2021 12:57 am
Subject: [TR] Grade 2 lock nuts

I need to replace the lock nuts uses to hold the diff flanges to the drive =
shafts on my stag. Can I use grade 2 nuts? Granger has some on clearance. I=
'm assuming basic nuts and bolts used Triumphs were grade 3 .
Sujit** [email-masked] **

Archive: http://www.team.net/pipermail/triumphs  http://www.team.net/archiv=
e

[email-masked]

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<div style="color:black;font: 12pt Arial, Helvetica, sans-serif;">
<div> <font size="3">I wouldn't use anything lower than Grade 5.&nbsp; I used some common hardware store (Grade 2) bolts and nuts on my MGB driveshaft once&nbsp; and they lasted less than a month.&nbsp; This was a long time ago and I was still learning.</font><br>
</div>

<div> <br>
</div>

<div style="clear:both"><font size="4">Dave </font><br>
<br>
</div>

<div> <br>
</div>

<div> <br>
</div>

<div style="font-family:arial,helvetica;font-size:10pt;color:black"><font size="2">-----Original Message-----<br>
From: Sujit Roy &lt;[email-masked]&gt;<br>
To: Triumphs &lt;[email-masked]&gt;<br>
Sent: Fri, May 14, 2021 12:57 am<br>
Subject: [TR] Grade 2 lock nuts<br>
<br>

<div id="yiv2190775361">
<div><br>
<span style="font-family:sans-serif;font-size:12.8px;">I need to replace the lock nuts uses to hold the diff flanges to the drive shafts on my stag. Can I use grade 2 nuts? Granger has some on clearance. I'm assuming basic nuts and bolts used Triumphs were grade 3 .</span>
<div style="color:rgb(136,136,136);font-family:sans-serif;font-size:12.8px;">
<div><br>
</div>

<div>Sujit</div>
</div>
</div>

</div>
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From: Nick Black <[email-masked]>
Date: Fri, 14 May 2021 06:44:38 -0700

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I believe that the usual nuts and bolts on a TR are equivalent to grade 5 or=
 so and they may have been higher grade in this application.
Grade 2 seems a bit =E2=80=9Cwimpy=E2=80=9D here. I would not use such a sof=
t nut especially in this application. Also, do not use =E2=80=9Cstandard=E2=80=
=9D bolts here as the flanges need to ride on the shank of the bolt, not on t=
he tread. Either buy the correct bolt and nut or use  NAS bolts and grade 8 l=
ocknuts.

Of course I may be a little =E2=80=9Cnuts=E2=80=9D myself...
Nick in NorCal=20

Sent from the wilds of NorCal=20

> On May 13, 2021, at 10:58 PM, Sujit Roy <[email-masked]> wrote:
>=20
> =EF=BB=BF
>=20
> I need to replace the lock nuts uses to hold the diff flanges to the drive=
> Donate: http://www.team.net/donate.html
> Archive: http://www.team.net/pipermail/triumphs  http://www.team.net/archi=
ve
>=20
> Unsubscribe/Manage: http://autox.team.net/mailman/options/triumphs/vintage=
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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto">I believe that the usual nuts and bolts on a=
 TR are equivalent to grade 5 or so and they may have been higher grade in t=
his application.<div>Grade 2 seems a bit =E2=80=9Cwimpy=E2=80=9D here. I wou=
ld not use such a soft nut especially in this application. Also, do not use =E2=
=80=9Cstandard=E2=80=9D bolts here as the flanges need to ride on the shank o=
f the bolt, not on the tread. Either buy the correct bolt and nut or use &nb=
sp;NAS bolts and grade 8 locknuts.</div><div><br></div><div>Of course I may b=
e a little =E2=80=9Cnuts=E2=80=9D myself...</div><div>Nick in NorCal&nbsp;<b=
r><br><div dir=3D"ltr">Sent from the wilds of NorCal&nbsp;</div><div dir=3D"=
ltr"><br><blockquote type=3D"cite">On May 13, 2021, at 10:58 PM, Sujit Roy &=
lt;[email-masked]&gt; wrote:<br><br></blockquote></div><blockquote ty=
pe=3D"cite"><div dir=3D"ltr">=EF=BB=BF<div dir=3D"auto"><br><span style=3D"f=
ont-family:sans-serif;font-size:12.8px">I need to replace the lock nuts uses=
 to hold the diff flanges to the drive shafts on my stag. Can I use grade 2 n=
uts? Granger has some on clearance. I'm assuming basic nuts and bolts used T=
riumphs were grade 3 .</span><div style=3D"color:rgb(136,136,136);font-famil=
y:sans-serif;font-size:12.8px" dir=3D"auto"><div dir=3D"auto"><br></div><div=
 dir=3D"auto">Sujit</div></div></div>
<span>** [email-masked] **</span><br><span></span><br><span>Donate:=
 http://www.team.net/donate.html</span><br><span>Archive: http://www.team.ne=
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n><br><span>Unsubscribe/Manage: http://autox.team.net/mailman/options/triump=
hs/[email-masked]</span><br></div></blockquote></div></body></html>=

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From: Greg Donovan <[email-masked]>
Date: Fri, 14 May 2021 11:06:07 -0400

A related by different question:

My instinct here, almost always, would be to err on the side of higher grades. Rated for 2, put a 3 on.

One disadvantage with this approach is cost: higher grades, more money. 

Other than higher cost, are there other disadvantages to using a higher grade than absolutely needed?

Are there situations where the lower grade is preferable? E.g., if something's going to fail under stress, you’d rather it be a grade 2 bolt than the expensive component it’s securing.

—Greg

> On May 14, 2021, at 9:44 AM, Nick Black <[email-masked]> wrote:
> 
> I believe that the usual nuts and bolts on a TR are equivalent to grade 5 or so and they may have been higher grade in this application.
> Grade 2 seems a bit “wimpy” here. I would not use such a soft nut especially in this application. Also, do not use “standard” bolts here as the flanges need to ride on the shank of the bolt, not on the tread. Either buy the correct bolt and nut or use  NAS bolts and grade 8 locknuts.
> 
> Of course I may be a little “nuts” myself...
> Nick in NorCal 

Unsubscribe/Manage: http://autox.team.net/mailman/options/triumphs/[email-masked]

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From: "Alex & Janet Thomson" <[email-masked]>
Date: Fri, 14 May 2021 13:38:55 -0400

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I believe that those bolts have a ground shank of an exact length so =
that they act as dowel pins. I would use at least a grade 5 nut. If you =
can=E2=80=99t find locknuts, I don=E2=80=99t see why some red Loctite =
wouldn=E2=80=99t work. A free driveshaft, whipping around in its tunnel =
at speed, would probably be a negative experience.

=20

Alex Thomson

=20

From: Triumphs [mailto:[email-masked]] On Behalf Of =
Sujit Roy
Sent: Friday, May 14, 2021 1:57 AM
To: Triumphs
Subject: [TR] Grade 2 lock nuts

=20

I need to replace the lock nuts uses to hold the diff flanges to the =
drive shafts on my stag. Can I use grade 2 nuts? Granger has some on =
clearance. I'm assuming basic nuts and bolts used Triumphs were grade 3 =
.

=20

Sujit

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vlink=3Dpurple><div class=3DWordSection1><p class=3DMsoNormal><span =
style=3D'font-family:"Calibri","sans-serif";color:#1F497D'>I believe =
that those bolts have a ground shank of an exact length so that they act =
as dowel pins. I would use at least a grade 5 nut. If you can=E2=80=99t =
find locknuts, I don=E2=80=99t see why some red Loctite wouldn=E2=80=99t =
work. A free driveshaft, whipping around in its tunnel at speed, would =
probably be a negative experience.<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-family:"Calibri","sans-serif";color:#1F497D'><o:p>&nbsp;</o=
:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Calibri","sans-serif";color:#1F497D'>Alex =
Thomson<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Calibri","sans-serif";color:#1F497D'><o:p>&nbsp;</o=
:p></span></p><p class=3DMsoNormal><b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span>=
</b><span style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'> =
Triumphs [mailto:[email-masked]] <b>On Behalf Of =
</b>Sujit Roy<br><b>Sent:</b> Friday, May 14, 2021 1:57 AM<br><b>To:</b> =
Triumphs<br><b>Subject:</b> [TR] Grade 2 lock =
nuts<o:p></o:p></span></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><div><p =
class=3DMsoNormal><br><span =
style=3D'font-size:9.5pt;font-family:"Arial","sans-serif"'>I need to =
replace the lock nuts uses to hold the diff flanges to the drive shafts =
on my stag. Can I use grade 2 nuts? Granger has some on clearance. I'm =
assuming basic nuts and bolts used Triumphs were grade 3 =
.</span><o:p></o:p></p><div><div><p class=3DMsoNormal><span =
style=3D'font-size:9.5pt;font-family:"Arial","sans-serif";color:#888888'>=
<o:p>&nbsp;</o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:9.5pt;font-family:"Arial","sans-serif";color:#888888'>=
Sujit<o:p></o:p></span></p></div></div></div></div></body></html>
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From: DAVID MASSEY <[email-masked]>
Date: Fri, 14 May 2021 18:16:18 +0000 (UTC)

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 When you get to Grade 8 you are faced with a brittleness and breakage wher=
e a lower grade will stretch.=C2=A0 I saw a grade 8 bolt break and it was j=
ust holding a rocker shaft pedestal.=C2=A0 Grade 5 is more than adequate.=
=C2=A0=20
=20
Dave=20

=20
=20
-----Original Message-----
From: Greg Donovan <[email-masked]>
To: Triumphs <[email-masked]>
Sent: Fri, May 14, 2021 10:06 am
Subject: Re: [TR] Grade 2 lock nuts

My instinct here, almost always, would be to err on the side of higher grad=
es. Rated for 2, put a 3 on.

One disadvantage with this approach is cost: higher grades, more money.=20

Other than higher cost, are there other disadvantages to using a higher gra=
de than absolutely needed?

Are there situations where the lower grade is preferable? E.g., if somethin=
g's going to fail under stress, you=E2=80=99d rather it be a grade 2 bolt t=
han the expensive component it=E2=80=99s securing.

=E2=80=94Greg

> I believe that the usual nuts and bolts on a TR are equivalent to grade 5=
 or so and they may have been higher grade in this application.
> Grade 2 seems a bit =E2=80=9Cwimpy=E2=80=9D here. I would not use such a =
soft nut especially in this application. Also, do not use =E2=80=9Cstandard=
=E2=80=9D bolts here as the flanges need to ride on the shank of the bolt, =
not on the tread. Either buy the correct bolt and nut or use=C2=A0 NAS bolt=
s and grade 8 locknuts.

[email-masked]

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<div style=3D"color:black;font: 12pt Arial, Helvetica, sans-serif;">
<div> <font size=3D"3">When you get to Grade 8 you are faced with a brittle=
ness and breakage where a lower grade will stretch.&nbsp; I saw a grade 8 b=
olt break and it was just holding a rocker shaft pedestal.&nbsp; Grade 5 is=
 more than adequate.&nbsp; </font><br>
</div>

<div> <br>
</div>

<div style=3D"clear:both"><font size=3D"4">Dave </font><br>
<br>
</div>

<div> <br>
</div>

<div> <br>
</div>

<div style=3D"font-family:arial,helvetica;font-size:10pt;color:black"><font=
 size=3D"2">-----Original Message-----<br>
From: Greg Donovan &lt;[email-masked]&gt;<br>
To: Triumphs &lt;[email-masked]&gt;<br>
Sent: Fri, May 14, 2021 10:06 am<br>
Subject: Re: [TR] Grade 2 lock nuts<br>
<br>

<div dir=3D"ltr">A related by different question:<br>
</div>

<div dir=3D"ltr"><br>
</div>

<div dir=3D"ltr">My instinct here, almost always, would be to err on the si=
de of higher grades. Rated for 2, put a 3 on.<br>
</div>

<div dir=3D"ltr"><br>
</div>

<div dir=3D"ltr">One disadvantage with this approach is cost: higher grades=
, more money. <br>
</div>

<div dir=3D"ltr"><br>
</div>

<div dir=3D"ltr">Other than higher cost, are there other disadvantages to u=
sing a higher grade than absolutely needed?<br>
</div>

<div dir=3D"ltr"><br>
</div>

<div dir=3D"ltr">Are there situations where the lower grade is preferable? =
E.g., if something's going to fail under stress, you=E2=80=99d rather it be=
 a grade 2 bolt than the expensive component it=E2=80=99s securing.<br>
</div>

<div dir=3D"ltr"><br>
</div>

<div dir=3D"ltr">=E2=80=94Greg<br>
</div>

<div dir=3D"ltr"><br>
</div>

<div dir=3D"ltr"><br>
</div>

<div dir=3D"ltr"><br>
</div>

<div dir=3D"ltr">&gt; On May 14, 2021, at 9:44 AM, Nick Black &lt;<a ymailt=
o=3D"mailto:[email-masked]" href=3D"mailto:[email-masked]=
">[email-masked]</a>&gt; wrote:<br>
</div>

<div dir=3D"ltr">&gt; <br>
</div>

<div dir=3D"ltr">&gt; I believe that the usual nuts and bolts on a TR are e=
quivalent to grade 5 or so and they may have been higher grade in this appl=
ication.<br>
</div>

<div dir=3D"ltr">&gt; Grade 2 seems a bit =E2=80=9Cwimpy=E2=80=9D here. I w=
ould not use such a soft nut especially in this application. Also, do not u=
se =E2=80=9Cstandard=E2=80=9D bolts here as the flanges need to ride on the=
 shank of the bolt, not on the tread. Either buy the correct bolt and nut o=
r use&nbsp; NAS bolts and grade 8 locknuts.<br>
</div>

<div dir=3D"ltr">&gt; <br>
</div>

<div dir=3D"ltr">&gt; Of course I may be a little =E2=80=9Cnuts=E2=80=9D my=
self...<br>
</div>

<div dir=3D"ltr">&gt; Nick in NorCal <br>
</div>

<div dir=3D"ltr"><br>
</div>

<div dir=3D"ltr">** <a ymailto=3D"mailto:[email-masked]" href=3D"m=
ailto:[email-masked]">[email-masked]</a> **<br>
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