M/C Studs for Manual Master Cylinder

[twinscrew698]

And one have or know the stud number or size to mount this thru the firewall to look at somewhat correct?
It is going on a 69 Coronet Drum Brake car.
Bought a Rebuilt Master Cyl and did not come with studs.
Any help would be appreciated.

 

[twinscrew698]

Anyone have anything?
Bolts or stud?

 

[nm9stheham]

I just checked my '62 Dart (B body) which has a dual drum MC (manual brakes, not power brakes) from a '67 Coronet, which lists the same MC as the '69 Coronet. It uses 4 5/16" dia, coarse thread bolts for mounting. The FSM for '62 says to remove 'bolts and nuts'.

 

[twinscrew698]

I just checked my '62 Dart (B body) which has a dual drum MC (manual brakes, not power brakes) from a '67 Coronet, which lists the same MC as the '69 Coronet. It uses 4 5/16" dia, coarse thread bolts for mounting. The FSM for '62 says to remove 'bolts and nuts'.

Thanks for the reply,at least now i can get the bolts Picked up!
My 68 RR has studs mounted on the M/C going thru the Firewall.So Bolts it is.

 

[nm9stheham]

Just make sure they are Grade 5 or better; you can put a heckuva lot of force on a MC; if you put 200 lbs on the pedal in a panic stop, there will be over 1000 lbs on the bolts and MC!

 

[Ron Ward]

These might work... McMaster-Carr has all sorts of cool hardware... http://www.mcmaster.com/#98060a340/=tl10ca

 

[YY1]

The ones on my 67 are 2".

Thanks for that link.
I'm hoping they might have ones with larger splines, as the raybestos M/C I bought through rockauto has larger holes and the splines don't engage.

- - - Updated - - -

BTW the link shows a grade 2 "low strength" stud.

 

[nm9stheham]

And really no reason to not use splines studs vs. bolts. Production standards changed from '62 in the later years. And I would not be surprised to see studs on any year for tha matter.

Here is a link for grade 5 ribbed bolts from Mcmaster but the ribbed shoulder diameter is not all that large and may not work. http://www.mcmaster.com/#98060a600/=tl9had

The round head style does not look right for an MC mount though. There must be a shoulder bolt out there that will work.

You might try Fastenal too.

 

[Ron Ward]

The ones on my 67 are 2".

Thanks for that link.
I'm hoping they might have ones with larger splines, as the raybestos M/C I bought through rockauto has larger holes and the splines don't engage.

- - - Updated - - -

I had the same issue with the hole size on the master cylinder on my Satellite. I took some short pieces of 14 ga. household copper wire, stripped off the insulation and inserted the copper into the hole. I then tapped the studs into the holes with a hammer, using the copper to "shim" the stud and hold it in place. I then trimmed the excess copper so it would not be seen and installed the master cylinder. Works like a champ.