bolts
Hi Jim, I did get more info on my bolt question, I should have posted it.
An expert I know sent me this:
My feeling on the bolt head issue is that (as you mentioned) Auto S are certainly the most commonly found bolt on the Tiger. Some Auto R's are mixed in there as well along with these others. Here is a list below that are on my MKII:
Auto S--trunk hinge spring plate-most common on Tiger
Auto R--Steering column & other longer length N.F. bolts
Rubery Owen S50-60--hood latch, bracket for trunk latch
Sparts S --hood hinge
Wiley S--hood latch at heater core (and Auto S's)
W W R S--hood hinge
SN-MW S--hood hinge, trunk latch
S-trunk mounted bracket for latch
I can't say with authority that the above is totally correct, only that not much of this Tiger has been apart. Some will say this bolt or that one isn't correct, but often it is a matter of their exposure.
Also, at times you will find a mix of brands on one bracket such as 2 Auto S and 1 Wiley holding down the hood latch above the heater core.
Alpine and Tiger bolts aren't necessarily the same for a particular location. For the most part, by the time parts were being bolted on the unibodys, the Alpine and Tiger were being built at two different locations.
'bracket by tanks' are 5/16" to tank, but nuts are out-nut has a ring on the face
I don't remember ever seeing a Frazer brand.
In conclusion, I believe Auto S & R's, Sparts S Wiley S, and Rubery Owen are the most common. One has to consider that on the assembly line if a bolt bin became empty for say for hood latches, they surely would move to another bolt brand to keep it rolling rather than shutting the line down.