Rich:
Thanks very much for the explanation.
For those making a list of the dimensions for part numbers, I stopped by and
measured one of the bolts this afternoon. The ATA 7232 is a grade 8; 3/8" x
24tpi bolt. It is .800 in length (measured from the underside of the head)
with a thread length of .500 inches. The hex head is 5/8" rather than the
standard 9/16 " for a 3/8" bolt.
The bolt is the same in each of the three different ratio (11/43; 11/39 and
10/41) differentials that are set up for my BJ8.
Best regards,
Jim Hockert
-----Original Message-----
From: Rich C [mailto:richchrysler@quickclic.net]
Sent: Thursday, September 16, 2010 2:15 PM
To: rjhco; healeys@autox.team.net
Subject: Re: [Healeys] Official Parts List Question
Jim is referring to the standard BMC letter and number codes for standard
fasteners. However, in the case of the crown wheel bolts (and for that
matter, many other specialty bolts throughout the car) are specific part
numbers and have nothing to do with the standard fastener codes. Therefore
ATA 7232 is a specific part number for that specific bolt.
Rich Chrysler
--------------------------------------------------
From: "rjhco" <rjh.co@tx.rr.com>
Sent: Thursday, September 16, 2010 11:51 AM
To: <healeys@autox.team.net>
Subject: [Healeys] Official Parts List Question
> The attachment bolts for the crown wheel (ring gear) are listed in the
> Official Parts List as: ATA 7232
>
> According to the fastener reference, the first two numbers are the
> diameter
> in 1/16ths and the second two numbers are the length in 1/8ths. Clearly,
> the system does not work for the above number. Also, ATA is not
> listed in the fastener references.
>
> Can someone please explain the above numbering system?
>
>>From memory, I believe that the bolts are grade 8; 3/8 x 24; one inch
>>in
> length. I don't have access to the bolts at the moment or I would
> measure them!
>
> Best regards,
> Jim
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