Re: [Healeys] 6-36 windscreen screws

[i erbs <eyera3000@gmail.com>]

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Curt, Do you have source for the screws? I think that is where this thread
started...

Ira Erbs
Portland,OR
      _______                                  _______
     (______ \____1959 BN4____/ _______)
         (_________________________)
          BT7 engine and disk brakes

On Wed, Feb 10, 2016 at 1:52 PM, Curtis Arndt <cnaarndt@gmail.com> wrote:

> Windscreen screws on 100s are no. 4 BA.  The six cylinder screws are NOT
> 2BA. AH Spares is wrong on this one.
>
> Regarding no. 2 BA and 10-32 being similar they may be about the same siz=
e
> but they are in NO WAY interchangeable!!!
>
> A 10-32 screw has 32 tpi and has a 60 degree pitch angle of the threads.
> A no. 2 BA has 31.4 tpi and is 47 1/2 degree pitch angle of the threads.
>
> Cheers,
>
> Curt
> AH Concours Registry Chairman and fastener expert
>
> On Wed, Feb 10, 2016 at 1:31 PM, Ian Hey <rianhey@btinternet.com> wrote:
>
>> Hello All
>>
>>
>>
>> I have a BJ7 and have been told (by AH Spares) that the windscreen screw=
s
>> are 2BA.  That is similar to No10 UNF so that is what mine now are.
>>
>>
>>
>> No 6-36 sounds as if it is very similar to 4BA which is 0.142 inch
>> diameter, 38.5 threads per inch.  BA (British Association) threads are
>> widely used for threads less than =C2=BC inch in all British mechanical =
and
>> electrical equipment up to the 1960s and 1970s.  They have probably died
>> out now in new equipment.  The largest is 0BA which has a diameter of 0.=
236
>> inch.
>>
>>
>>
>> I suspect that the windscreen screws referred to as No 6-36 are actually
>> 4BA
>>
>>
>>
>> Regards
>>
>>
>>
>> Ian Hey
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
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<div dir=3D"ltr">Curt, Do you have source for the screws? I think that is w=
here this thread started...</div><div class=3D"gmail_extra"><br clear=3D"al=
l"><div><div class=3D"gmail_signature"><div dir=3D"ltr"><div><div dir=3D"lt=
r"><div dir=3D"ltr">Ira Erbs<div>Portland,OR</div><div><span style=3D"font-=
family:&#39;Times New Roman&#39;,serif">=C2=A0 =C2=A0 =C2=A0 _______ =C2=A0=
 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0_______</span><br style=3D"font-famil=
y:&#39;Times New Roman&#39;,serif"><span style=3D"font-family:&#39;Times Ne=
w Roman&#39;,serif">=C2=A0 =C2=A0=C2=A0 (______ \____1959 BN4____/ _______)=
</span><br style=3D"font-family:&#39;Times New Roman&#39;,serif"><span styl=
e=3D"font-family:&#39;Times New Roman&#39;,serif">=C2=A0 =C2=A0 =C2=A0 =C2=
=A0=C2=A0 (_________________________)</span></div><div>=C2=A0 =C2=A0 =C2=A0=
 =C2=A0 =C2=A0 BT7 engine and disk brakes</div></div></div></div></div></di=
v></div>
<br><div class=3D"gmail_quote">On Wed, Feb 10, 2016 at 1:52 PM, Curtis Arnd=
t <span dir=3D"ltr">&lt;<a href=3D"mailto:cnaarndt@gmail.com"; target=3D"_bl=
ank">cnaarndt@gmail.com</a>&gt;</span> wrote:<br><blockquote class=3D"gmail=
_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:=
1ex"><div dir=3D"ltr"><div><div><div><div>Windscreen screws on 100s are no.=
 4 BA.=C2=A0 The six cylinder screws are NOT 2BA. AH Spares is wrong on thi=
s one.<br><br></div>Regarding no. 2 BA and 10-32 being similar they may be =
about the same size but they are in NO WAY interchangeable!!!<br><br></div>=
A 10-32 screw has 32 tpi and has a 60 degree pitch angle of the threads.=C2=
=A0 A no. 2 BA has 31.4 tpi and is 47 1/2 degree pitch angle of the threads=
.<br><br></div>Cheers,<br><br></div>Curt <br>AH Concours Registry Chairman =
and fastener expert<br></div><div class=3D"gmail_extra"><br><div class=3D"g=
mail_quote"><span class=3D"">On Wed, Feb 10, 2016 at 1:31 PM, Ian Hey <span=
 dir=3D"ltr">&lt;<a href=3D"mailto:rianhey@btinternet.com"; target=3D"_blank=
">rianhey@btinternet.com</a>&gt;</span> wrote:<br></span><blockquote class=
=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padd=
ing-left:1ex"><div><div class=3D"h5">




<u></u>





<div link=3D"blue" vlink=3D"purple" lang=3D"EN-GB">

<div>

<p class=3D"MsoNormal"><font size=3D"2" face=3D"Arial"><span style=3D"font-=
size:10.0pt;font-family:Arial">Hello All<u></u><u></u></span></font></p>

<p class=3D"MsoNormal"><font size=3D"2" face=3D"Arial"><span style=3D"font-=
size:10.0pt;font-family:Arial"><u></u>=C2=A0<u></u></span></font></p>

<p class=3D"MsoNormal"><font size=3D"2" face=3D"Arial"><span style=3D"font-=
size:10.0pt;font-family:Arial">I have a BJ7 and have been told (by AH Spare=
s) that the
windscreen screws are 2BA.=C2=A0 That is similar to No10 UNF so that is wha=
t
mine now are.<u></u><u></u></span></font></p>

<p class=3D"MsoNormal"><font size=3D"2" face=3D"Arial"><span style=3D"font-=
size:10.0pt;font-family:Arial"><u></u>=C2=A0<u></u></span></font></p>

<p class=3D"MsoNormal"><font size=3D"2" face=3D"Arial"><span style=3D"font-=
size:10.0pt;font-family:Arial">No 6-36 sounds as if it is very similar to 4=
BA which is
0.142 inch diameter, 38.5 threads per inch.=C2=A0 BA (British Association)
threads are widely used for threads less than =C2=BC inch in all British me=
chanical
and electrical equipment up to the 1960s and 1970s.=C2=A0 They have probabl=
y
died out now in new equipment.=C2=A0 The largest is 0BA which has a diamete=
r of
0.236 inch.<u></u><u></u></span></font></p>

<p class=3D"MsoNormal"><font size=3D"2" face=3D"Arial"><span style=3D"font-=
size:10.0pt;font-family:Arial"><u></u>=C2=A0<u></u></span></font></p>

<p class=3D"MsoNormal"><font size=3D"2" face=3D"Arial"><span style=3D"font-=
size:10.0pt;font-family:Arial">I suspect that the windscreen screws referre=
d to as No 6-36
are actually 4BA<u></u><u></u></span></font></p>

<p class=3D"MsoNormal"><font size=3D"2" face=3D"Arial"><span style=3D"font-=
size:10.0pt;font-family:Arial"><u></u>=C2=A0<u></u></span></font></p>

<p class=3D"MsoNormal"><font size=3D"2" face=3D"Arial"><span style=3D"font-=
size:10.0pt;font-family:Arial">Regards<span><font color=3D"#888888"><u></u>=
<u></u></font></span></span></font></p><span><font color=3D"#888888">

<p class=3D"MsoNormal"><font size=3D"2" face=3D"Arial"><span style=3D"font-=
size:10.0pt;font-family:Arial"><u></u>=C2=A0<u></u></span></font></p>

<p class=3D"MsoNormal"><u></u><font size=3D"2" face=3D"Arial"><span style=
=3D"font-size:10.0pt;font-family:Arial">Ian Hey</span></font><u></u><font s=
ize=3D"2" face=3D"Arial"><span style=3D"font-size:10.0pt;font-family:Arial"=
><u></u><u></u></span></font></p>

<p class=3D"MsoNormal"><font size=3D"3" face=3D"Arial"><span style=3D"font-=
size:12.0pt;font-family:Arial"><u></u>=C2=A0<u></u></span></font></p>

<p class=3D"MsoNormal"><font size=3D"2" face=3D"Arial"><span style=3D"font-=
size:10.0pt;font-family:Arial"><u></u>=C2=A0<u></u></span></font></p>

<p class=3D"MsoNormal"><font size=3D"3" face=3D"Arial"><span style=3D"font-=
size:12.0pt;font-family:Arial"><u></u>=C2=A0<u></u></span></font></p>

<p class=3D"MsoNormal"><font size=3D"3" face=3D"Arial"><span style=3D"font-=
size:12.0pt;font-family:Arial"><u></u>=C2=A0<u></u></span></font></p>

<p class=3D"MsoNormal"><font size=3D"3" face=3D"Arial"><span style=3D"font-=
size:12.0pt;font-family:Arial"><u></u>=C2=A0<u></u></span></font></p>

</font></span></div>

</div>


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