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Re: [Healeys] No Activity

To: Curtis Arndt <cnaarndt@gmail.com>, Healey List <healeys@autox.team.net>
Subject: Re: [Healeys] No Activity
From: Bob Haskell <rchaskell@earthlink.net>
Date: Thu, 09 Jan 2014 18:39:08 -0500
Delivered-to: mharc@autox.team.net
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Curt,

I think I've managed to confuse.  When I've stated 3/4"-14, I'm giving 
the major diameter of the thread as 3/4".  A 3/4-14 BSP has a major 
diameter of 1.041".  I've not found a chart of BSP thread sizes that 
lists a major diameter of 3/4".  It would fall between the 3/8-19 and 
1/2-14.  So, 7/16-14 BSP?

Cheers,

Bob Haskell
AHCA 3000 Mk I registrar
http://www.ciahc.org/registry_3000mk1.php

On 01/09/2014 04:57 PM, Curtis Arndt wrote:
> Bob & Stephen,
>
> The wrench size is 9/16" W (Whitworth) which is also a listed as a 5/8"
> BSF (British Standard Fine).  A far as the threads go, they should be a
> Whitworth Thread Form, possibly BSP (British Standard Pipe). I haven't
> been able to check the threads per inch, but others have stated they're
> a 3/4" and 14 tpi which corresponds to BSP (Parallel).  This was
> measured and confirmed on my NOS 100 oil pan.
>
> However you're not going to find this size nut at any hardware store,
> it's a special fastener and you'll have to find a used one, or have one
> cu$tom machined, unless of course one of the AH suppliers has them.
>
> Remember my warning about using 60 degree thread forms in a 55 degree
> Whitworth applications, lest you want to be known as a future (HFDPO)
> Ham Fisted Dreaded Previous Owner
>
> I'd be interested in what Moss has to say.
>
> Cheers,
>
> Curt
>
>
> On Thu, Jan 9, 2014 at 1:24 PM, Bob Haskell <rchaskell@earthlink.net
>
>     Well, I measured another oil pan plug (drained some oil too).  Same
>     threads: 3/4"-14 TPI. I've sent an email to Moss to see what theirs
>     are.  I've not found a British thread standard that includes it
>     (BSW, BSF or BSP).  In metric terms, it might be 19mm - 1.8, but
>     didn't find that either.  There's 3/4-14 UNS, but then you get into
>     the 55 versus 60 degree issue.
>
>     Cheers,
>
>     Bob Haskell
>     AHCA 3000 Mk I registrar
>     http://www.ciahc.org/registry___3000mk1.php
>     <http://www.ciahc.org/registry_3000mk1.php>
>
>     On 01/08/2014 07:10 PM, Larry Wendland wrote:
>
>         Were is everybody?  I've had no emails since Randy "Hicks Bring A
>         Trailer" email at 11:28 am EST this morning?
>
>         Larry
>         '67 BJ8
>         Sent 7:10 pm EST
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