TR6 need the carb mounting stud size for 1974 TR6

[Norton47]

Can anybody help?
These seem to be a mish mash on my car, some even have metric size nuts.
What are these suppose to be. Would like stud length, thread per inch for both ends.
Thanks

 

[TR3driver]

Don't have one handy to check, but what I can come up with is : P/N 132873 (factory SPC) which Moss UK has cross-referenced to TE605141. And according to an old Moss UK catalog, TE605141 is 5/16" UNF at both ends and 1-3/4" long.

Not specified, but likely, is that the threads are unequal length, with the manifold side being perhaps only 3/8" and the carb side being longer.

 

[rlandrum]

Those are probably the same as on the TR3A. I found carb stud listed on moss.. 318-020.

 

[2wrench]

I think that 1 3/4 length 5/16 fine thread I can confirm.

Cannot comment with assurance re thread length differences. From what I can see, there is
no difference.

 

[TR3driver]

Cannot comment with assurance re thread length differences. From what I can see, there is
no difference.

Shouldn't matter, as long as the nut pulls up against the carb and not against the end of the threads.

 

[piman]

Hello Randall,

I'm surprised, I would have expected U.N.C. for the manifold end of the stud? Still, it's a while since I removed any.

Alec

 

[TR3driver]

I'm surprised, I would have expected U.N.C. for the manifold end of the stud?

Me too, but I vaguely recall being surprised when I found fine threads in a GT6 manifold. And I'm just reporting what I found in the documentation, I don't actually have a TR6 to check. (Had a TR6 motor but gave it away.) The Stag studs are a different P/N and of course it's manifold is totally different, so that's no help.

So come on, all you TR6 owners out there. Pile in here and tell me I'm wrong !

 

[bash]

I got these studs from TRF last year. Part number I bought was FHS2513. That's not the part number given in the blue book, but somewhere I found a list of part number supersession data (Rimmer Bros maybe?) and that's where the FHS number came from. They fit fine, though any 5/16 UNF x 1 5/8 inch long stud would probably do just as well.

Hope that helps
Alistair

 

[hondo402000]

5/16 24 threads per inch, just replace mine with bolts

 

[piman]

Hello Hondo,

I take it you are not planning to remove the carburettors too often then? From an engineering point of view bolts in that application is an inferior set up.

Alec

 

[2wrench]

I'm surprised, I would have expected U.N.C. for the manifold end of the stud?

Me too, but I vaguely recall being surprised when I found fine threads in a GT6 manifold. And I'm just reporting what I found in the documentation, I don't actually have a TR6 to check. (Had a TR6 motor but gave it away.) The Stag studs are a different P/N and of course it's manifold is totally different, so that's no help.

So come on, all you TR6 owners out there. Pile in here and tell me I'm wrong !

Randall: No need to throw on the flak jacket on my
account.

 

[davidk]

Here's a picture. Threads are 5/16-24.

 

[2wrench]

Well done, David! That's what I'm talking about.
BCF is good.....and only as good as its members.

Commendable work.

 

[Norton47]

Thanks David
That looks like 1 and 3/4 inch long. Correct?

 

[davidk]

Yes, right at 1 3/4.