Thanks. There is no telling what rhyme or reason was used as far as the
part numbers used for various Whitworth fasteners. And, you bring up
another very good point about strength ratings. A 3/8" X 1" long BSF hex
bolt with an "R" strength rating may have a different part number than the
same bolt, but with a higher "T" or "V" strength rating as used in the
engine and other high stress components.
>
> Typically the most common strength rating codes I see in our cars are *"B",
> "R", "S", "T", *and* "V"* going from lowest strength of the "B" rating,
> most likely an SAE Grade 2, to the highest rating of "V", which roughly
> corresponds to a Grade 8.
>
> Cheers,
>
> Curt
>
>
>
>
> On Thu, Sep 16, 2010 at 3:51 PM, Alan Seigrist <healey.nut@gmail.com>wrote:
>
>> Curt -
>>
>> I've done an extensive partial decode on the BSF fasteners from my
>> A90. Since all the fasteners on that car are BSF & BA, my code list
>> is quite good at this time.
>>
>> Many engine and drivetrain bolts, however, use oddball codes because
>> of bolt ratings (there are several levels in British boltdom) and odd
>> lengths or special heads. It can get very complicated so my bolt list
>> focuses on standard grade bolts used on the chassis.
>>
>> I'll send that list to John Sims, it would be great if you can
>> augment it when you do your disassembly.
>>
>> Cheers,
>>
>> Alan
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