1965 PB Booster and Master Cylinder Attachment Bolts

[James W.]

I'm trying to verify the plating finishes for the upper bolts and lower hex nuts and lock washers that attach the power brake booster to the firewall. Also the hex nuts that attach the power brake reservoir to the booster. The 1965 TIJG does not describe the finishes for the attachment hardware. I would think the power brake booster attachment hardware would be grey or black phosphate and the bower brake master cylinder hardware would be silver zinc?

Thanks in advance.

James West

[Joe L.]

Re: 1965 PB Booster and Master Cylinder Attachment Bolts

I'm trying to verify the plating finishes for the upper bolts and lower hex nuts and lock washers that attach the power brake booster to the firewall. Also the hex nuts that attach the power brake reservoir to the booster. The 1965 TIJG does not describe the finishes for the attachment hardware. I would think the power brake booster attachment hardware would be grey or black phosphate and the bower brake master cylinder hardware would be silver zinc?

Thanks in advance.

James West

James-------


booster upper bolts----GM #3781994-----3/8-16 X 1", captured split lock washer, zinc finish

m/c nut, booster nut---GM #9418931-----3/8-16, phosphate finish

m/c lock washer, booster lock washer-----GM #103321-----3/8", natural finish