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Re: [Healeys] BN2 screw in the center of the dash

To: "'David Nock BCS'" <healeydoc@sbcglobal.net>
Subject: Re: [Healeys] BN2 screw in the center of the dash
From: Henry G Leach via Healeys <healeys@autox.team.net>
Date: Tue, 23 Mar 2021 04:02:17 +0000 QuHeLgXw4IHx4MArGraBsb7ePzJEoScxA5iz53xp6LsX1yLd4vvKb/qMVBW1yWY28l+V/dUVZO691gZeX6BF/deEyhPH0RV7Y3jGkqiZjWYoev5WnS5iGEH6
Cc: 'Healey List' <healeys@autox.team.net>
Delivered-to: mharc@autox.team.net
Delivered-to: healeys@autox.team.net
Importance: Normal
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That was what I really appreciated about Norman. He was so exacting,=0Ak=
nowledgeable, and took the time to research and answer any question=0Are=
lated to British car maintainence.=0AHe is revered as a legend for solvi=
ng issues with British cars. Sure=0Amiss him. Excellent article. Hank=0A=
=0A=09-----------------------------------------From: "David Nock BCS"=
 =0ATo: "Bob Spidell"=0ACc: "Healey List"=0ASent: Monday March 22 2021 1=
0:21:16AM=0ASubject: Re: [Healeys] BN2 screw in the center of the dash=
=0A=0A   Here is the real story of the Pozi and Phillips Screws as they=
 say=0Ait came right from the horses mouth. In 1996 my father interviewe=
d the=0APhillips family the designer of the Phillips and Pozi Screws. Th=
ey=0Apersonally approved this article that my father wrote on the Philli=
ps=0AScrew the Austin Healey Magazine. This and many other articles are=
 in=0Aour Healey Tech Talk Book.   The bottom line is the Phillips Screw=
 is=0Adesigned to slip out at a pre dertimined torque, and the Pozi Scre=
w is=0Adesigned to not slip out.   And the Pozi Screw was developed in a=
bout=0A1956 for the automotive industry so there is no way that they cou=
ld=0Ahave been installed on a BN1.      David Nock=0A British Car Specia=
lists=0A 209-948-8767=0Awww.britishcarspecialists.com [1]   =0A      FRO=
M: Henry G Leach via Healeys SENT: Monday, March 22, 2021=0A9:47 AM TO:=
 'Bob Spidell' CC: 'Healey List' SUBJECT: Re: [Healeys] BN2=0Ascrew in t=
he center of the dash       Guys-pozidriv screws were used=0Aon the late=
r 3000, etc. as a production item. This type of screw was=0Aused with a=
 special tool to "quickly" install screws on the line. It=0Awas another=
 way BMC was trying to make a buck on underpriced and=0Aover-difficult a=
ssembly of vehicles. Then they went broke...Hank=0A=0A=09---------------=
-------------------------- From: "Bob Spidell"=0A To: "Curtis Arndt"=0A=
 Cc: "Healey List"=0A Sent: Monday March 22 2021 9:01:24AM=0A Subject: R=
e: [Healeys] BN2 screw in the center of the dash=0A=0A Thanks for the co=
rrection, Curt. I'd always wondered why 'posidrive'=0Ascrews were used--=
I think posidrive is a relatively recent=0Adevelopment--and why regular=
 phillips drivers worked in them (I think=0Aposidrive has a steeper angl=
e of the screw blades). I have a posidrive=0Ascrewdriver, but I usually=
 grabbed whatever was handy. Do you know of=0Aa source for the correctly=
 marked screws?=0A=0A Do you know if the backing flat washer was tapped=
 (I don't think so,=0Abut I'm not sure). IIRC there is a tapped plate th=
at binds the=0Ascrews--again, chromed--that attach the rearview mirror.=
=0A=0A Bob=0A=0AOn 3/22/2021 7:59 AM, Curtis Arndt wrote:=0A  Hi Bob and=
 Joe,   Just a quick correction, "Pozidriv " screws were=0Anever used on=
 AH 100s, BN1/2s.    The four marks on the head of these=0A10-32 screws=
 were there to denote UNF from "Whitworth" during the=0Achangeover to th=
e Unified screw thread forms in the 1950s.   I've=0Aattached a page from=
 my vintage Machinery's Handbook which illustrates=0Athis fact.   Cheers=
,   Curt     On Sun, Mar 21, 2021 at 11:27 PM Bob=0ASpidell  wrote:=0A =
 I neglected to mention the screw is backed-up with a large, extra=0Athi=
ck flat washer (because of the large hole in the bracket). It's=0Aunique=
 because it's as thick as a couple of typical flat washers and=0A_might-=
-_I don't recall for sure--be tapped for the screw.=0A=0AOn 3/21/2021 10=
:21 PM, Bob Spidell wrote:=0A Yep. And, the original screw is chromed po=
sidriv, with a slightly=0Aoversized--the screw is a #10 IIRC--chrome was=
her. I noted this when=0Awe tore down our BN2 for restoration, and promi=
sed myself I'd not lose=0Athese. I lost them (and have never found prope=
r replacements).=0A=0A You can sorta see them in this grainy photo (I _s=
houlda_ took more).=0A=0A Bob=0A=0AOn 3/21/2021 4:14 PM, Joseph Costa wr=
ote:=0A  Does it just attach to the brace behind the dash?   Joe BN1 #92=
3 BN2=0A100M BJ8 Blue Baby  =0A=0A _____________________________________=
__________=0A Support Team.Net "_blank" moz-do-not-send=3D"true">=0A"htt=
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<html><body>That was what I really appreciated about Norman.&nbsp; He wa=
s so exacting, knowledgeable, and took the time to research and answer a=
ny question related to British car maintainence.<div><br></div><div>He i=
s revered as a legend for solving issues with British cars. Sure miss hi=
m.&nbsp; Excellent article. Hank<br><br><div class=3D"reply-new-signatur=
e"></div><p>-----------------------------------------</p>From: "David No=
ck BCS" <healeydoc@sbcglobal.net><br>To:  "Bob Spidell"<br>Cc: "Healey L=
ist"<br>Sent: Monday March 22 2021 10:21:16AM<br>Subject: Re: [Healeys]=
 BN2 screw in the center of the dash<br><br>=0A<div dir=3D"ltr">=0A<div=
 style=3D"font-size:12pt;font-family:Century;color:#000000;">=0A<div>Her=
e is the real story of the Pozi and Phillips Screws as they=0Asay it cam=
e right from the horses mouth. In 1996 my father=0Ainterviewed the Phill=
ips family the designer of the Phillips and=0APozi Screws. They personal=
ly approved this article that my father=0Awrote on the Phillips Screw th=
e Austin Healey Magazine. This and=0Amany other articles are in our Heal=
ey Tech Talk Book.</div>=0A<div>&nbsp;</div>=0A<div>The bottom line is t=
he Phillips Screw is designed to slip out=0Aat a pre dertimined torque,=
 and the Pozi Screw is designed to not=0Aslip out.</div>=0A<div>&nbsp;</=
div>=0A<div>And the Pozi Screw was developed in about 1956 for the=0Aaut=
omotive industry so there is no way that they could have been=0Ainstalle=
d on a BN1.</div>=0A<div>&nbsp;</div>=0A<div>&nbsp;</div>=0A<div style=
=3D"font-size:12pt;font-family:Century;color:#000000;">=0A<div style=3D"=
font-size:12pt;font-family:Century;color:#000000;">David=0ANock<br>=0ABr=
itish Car Specialists<br>=0A209-948-8767<br><a href=3D"http://www.britis=
hcarspecialists.com">www.britishcarspecialists.com</a></div>=0A<div styl=
e=3D"font-size:12pt;font-family:Century;color:#000000;">=0A&nbsp;</div>=
=0A<br></div>=0A<div style=3D"font-size:small;text-decoration:none;font-=
family:Calibri;font-weight:normal;color:#000000;font-style:normal;">=0A<=
div style=3D"font:10pt tahoma;">=0A<div>&nbsp;</div>=0A<div style=3D"bac=
kground:#f5f5f5;">=0A<div><b>From:</b> <a title=3D"healeys@autox.team.ne=
t">Henry G Leach via Healeys</a></div>=0A<div><b>Sent:</b> Monday, March=
 22, 2021 9:47 AM</div>=0A<div><b>To:</b> <a title=3D"bspidell@comcast.n=
et">'Bob=0ASpidell'</a></div>=0A<div><b>Cc:</b> <a title=3D"healeys@auto=
x.team.net">'Healey=0AList'</a></div>=0A<div><b>Subject:</b> Re: [Healey=
s] BN2 screw in the center of the=0Adash</div>=0A</div>=0A</div>=0A<div>=
&nbsp;</div>=0A</div>=0A<div style=3D"font-size:small;text-decoration:no=
ne;font-family:Calibri;font-weight:normal;color:#000000;font-style:norma=
l;">=0AGuys-pozidriv screws were used on the later 3000, etc. as a=0Apro=
duction item. This type of screw was used with a special tool to=0A"quic=
kly" install screws on the line. It was another way BMC was=0Atrying to=
 make a buck on underpriced and over-difficult assembly of=0Avehicles. T=
hen they went broke...Hank<br><br><div class=3D"reply-new-signature"></d=
iv>=0A<p>-----------------------------------------</p>=0AFrom: "Bob Spid=
ell"<br>=0ATo: "Curtis Arndt"<br>=0ACc: "Healey List"<br>=0ASent: Monday=
 March 22 2021 9:01:24AM<br>=0ASubject: Re: [Healeys] BN2 screw in the c=
enter of the dash<br><br>=0AThanks for the correction, Curt. I'd always=
 wondered why=0A'posidrive' screws were used--I think posidrive is a rel=
atively=0Arecent development--and why regular phillips drivers worked in=
 them=0A(I think posidrive has a steeper angle of the screw blades). I h=
ave=0Aa posidrive screwdriver, but I usually grabbed whatever was handy.=
=0ADo you know of a source for the correctly marked screws?<br><br>=0ADo=
 you know if the backing flat washer was tapped (I don't think=0Aso, but=
 I'm not sure). IIRC there is a tapped plate that binds the=0Ascrews--ag=
ain, chromed--that attach the rearview mirror.<br><br>=0ABob<br><br><br>=
<div class=3D"moz-cite-prefix">On 3/22/2021 7:59 AM, Curtis Arndt=0Awrot=
e:<br></div>=0A<blockquote>=0A<div dir=3D"ltr">Hi Bob and Joe,=0A<div>&n=
bsp;</div>=0A<div>Just a quick correction, "Pozidriv " screws were never=
 used on=0AAH 100s, BN1/2s.&nbsp;</div>=0A<div>&nbsp;</div>=0A<div>The f=
our marks on the head of these 10-32 screws were there to=0Adenote UNF f=
rom "Whitworth" during the changeover to the Unified=0Ascrew thread form=
s in the 1950s.</div>=0A<div>&nbsp;</div>=0A<div>I've attached a page fr=
om my vintage Machinery's Handbook=0Awhich illustrates this fact.</div>=
=0A<div>&nbsp;</div>=0A<div>Cheers,</div>=0A<div>&nbsp;</div>=0A<div>Cur=
t</div>=0A</div>=0A<div>&nbsp;</div>=0A<div class=3D"gmail_quote">=0A<di=
v class=3D"gmail_attr" dir=3D"ltr">On Sun, Mar 21, 2021 at 11:27 PM=0ABo=
b Spidell &lt;<a>bspidell@comcast.net</a>&gt; wrote:<br></div>=0A<blockq=
uote class=3D"gmail_quote" style=3D"padding-left:1ex;border-left:rgb(204=
,204,204) 1px solid;margin:0px 0px 0px .8ex;">=0A<div>I neglected to men=
tion the screw is backed-up with a large,=0Aextra thick flat washer (bec=
ause of the large hole in the bracket).=0AIt's unique because it's as th=
ick as a couple of typical flat=0Awashers and <i>might--</i>I don't reca=
ll for sure--be tapped for=0Athe screw.<br><br><div>On 3/21/2021 10:21 P=
M, Bob Spidell wrote:<br></div>=0A<blockquote>Yep. And, the original scr=
ew is chromed posidriv, with=0Aa slightly oversized--the screw is a #10=
 IIRC--chrome washer. I=0Anoted this when we tore down our BN2 for resto=
ration, and promised=0Amyself I'd not lose these. I lost them (and have=
 never found proper=0Areplacements).<br><br>=0AYou can sorta see them in=
 this grainy photo (I <i>shoulda</i> took=0Amore).<br><br>=0ABob<br><br>=
<div>On 3/21/2021 4:14 PM, Joseph Costa wrote:<br></div>=0A<blockquote>=
=0A<div dir=3D"ltr">Does it just attach to the brace behind the dash?=0A=
<div>&nbsp;</div>=0A<div>Joe</div>=0A<div>BN1 #923</div>=0A<div>BN2 100M=
</div>=0A<div>BJ8 Blue Baby</div>=0A</div>=0A<br></blockquote>=0A<br><br=
>=0A_______________________________________________<br>=0ASupport Team.N=
et "_blank" moz-do-not-send=3D"true"&gt; "<a href=3D"http://www.team.net=
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