finish used on 67 master cylinder lids

[William Krasovec]

I'm sure this has been covered over and over. What finish was used on the cover ,strap and bolt on 67 master cylinders ? I've lost all my references for finishes used on fasteners and other parts. I've upgraded the original single pot on my 66 Coronet Thanks

 

[Jerry Hall]

From my unrestored 67 GTX. Lower left corner of picture.

 

[William Krasovec]

Thanks. The bolt and strap look to have been natural. Can you tell if the lid was natural or yellow zinc dichromate?. Maybe even silver zinc ? I wish I still had my 67 GTX. It was bronze with a black vinyl roof.

 

[Jerry Hall]

Yellow zinc

 

[William Krasovec]

Thanks that my next project.

 

[gtx6970]

Lid is yellow zinc dichromate
Strap is natural steel.
Bolt is black phosphate