[Healeys] BN2 screw in the center of the dash

Tue Mar 23 20:40:22 MDT 2021

Thanks to all for the help and additional input

Joe

On Tue, Mar 23, 2021 at 12:03 AM Henry G Leach via Healeys <
healeys at autox.team.net> wrote:

> That was what I really appreciated about Norman.  He was so exacting,
> knowledgeable, and took the time to research and answer any question
> related to British car maintainence.
>
> He is revered as a legend for solving issues with British cars. Sure miss
> him.  Excellent article. Hank
>
> -----------------------------------------
> From: "David Nock BCS"
> To: "Bob Spidell"
> Cc: "Healey List"
> Sent: Monday March 22 2021 10:21:16AM
> Subject: Re: [Healeys] BN2 screw in the center of the dash
>
> Here is the real story of the Pozi and Phillips Screws as they say it came
> right from the horses mouth. In 1996 my father interviewed the Phillips
> family the designer of the Phillips and Pozi Screws. They personally
> approved this article that my father wrote on the Phillips Screw the Austin
> Healey Magazine. This and many other articles are in our Healey Tech Talk
> Book.
>
> The bottom line is the Phillips Screw is designed to slip out at a pre
> dertimined torque, and the Pozi Screw is designed to not slip out.
>
> And the Pozi Screw was developed in about 1956 for the automotive industry
> so there is no way that they could have been installed on a BN1.
>
>
> David Nock
> British Car Specialists
> 209-948-8767
> www.britishcarspecialists.com
>
>
>
> *From:* Henry G Leach via Healeys
> *Sent:* Monday, March 22, 2021 9:47 AM
> *To:* 'Bob Spidell'
> *Cc:* 'Healey List'
> *Subject:* Re: [Healeys] BN2 screw in the center of the dash
>
> Guys-pozidriv screws were used on the later 3000, etc. as a production
> item. This type of screw was used with a special tool to "quickly" install
> screws on the line. It was another way BMC was trying to make a buck on
> underpriced and over-difficult assembly of vehicles. Then they went
> broke...Hank
>
> -----------------------------------------
> From: "Bob Spidell"
> To: "Curtis Arndt"
> Cc: "Healey List"
> Sent: Monday March 22 2021 9:01:24AM
> Subject: Re: [Healeys] BN2 screw in the center of the dash
>
> Thanks for the correction, Curt. I'd always wondered why 'posidrive'
> screws were used--I think posidrive is a relatively recent development--and
> why regular phillips drivers worked in them (I think posidrive has a
> steeper angle of the screw blades). I have a posidrive screwdriver, but I
> usually grabbed whatever was handy. Do you know of a source for the
> correctly marked screws?
>
> Do you know if the backing flat washer was tapped (I don't think so, but
> I'm not sure). IIRC there is a tapped plate that binds the screws--again,
> chromed--that attach the rearview mirror.
>
> Bob
>
>
> On 3/22/2021 7:59 AM, Curtis Arndt wrote:
>
> Hi Bob and Joe,
>
> Just a quick correction, "Pozidriv " screws were never used on AH 100s,
> BN1/2s.
>
> The four marks on the head of these 10-32 screws were there to denote UNF
> from "Whitworth" during the changeover to the Unified screw thread forms in
> the 1950s.
>
> I've attached a page from my vintage Machinery's Handbook which
> illustrates this fact.
>
> Cheers,
>
> Curt
>
> On Sun, Mar 21, 2021 at 11:27 PM Bob Spidell <bspidell at comcast.net> wrote:
>
>> I neglected to mention the screw is backed-up with a large, extra thick
>> flat washer (because of the large hole in the bracket). It's unique because
>> it's as thick as a couple of typical flat washers and *might--*I don't
>> recall for sure--be tapped for the screw.
>>
>> On 3/21/2021 10:21 PM, Bob Spidell wrote:
>>
>> Yep. And, the original screw is chromed posidriv, with a slightly
>> oversized--the screw is a #10 IIRC--chrome washer. I noted this when we
>> tore down our BN2 for restoration, and promised myself I'd not lose these.
>> I lost them (and have never found proper replacements).
>>
>> You can sorta see them in this grainy photo (I *shoulda* took more).
>>
>> Bob
>>
>> On 3/21/2021 4:14 PM, Joseph Costa wrote:
>>
>> Does it just attach to the brace behind the dash?
>>
>> Joe
>> BN1 #923
>> BN2 100M
>> BJ8 Blue Baby
>>
>>
>>
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