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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