Firewall Screw/Bolt Size?

406CID

406CID

Junior Member
I don't have access to a 28 or 29, but my both my 30 and 31 firewalls take a 10-32 screw in the clip that secures the generator cutout wire to the firewall at the terminal box. Can anyone tell me if 28/29 also takes a #10/32 screw?

Mike's says it's a 12-24 for 1928-1931:
http://www.mikes-afordable.com/product/A14577BR.html
but I know that's not right, since both of mine are 10-32.

I'm trying to put together a wiring kit that picks up a chassis ground at that point. I plan to include the right size screw in the kit and the harness needs to have the right size connector. But what's the right size? #10 or #12?

Thanks,
Kyle
 
Mine is a early 29 and where there are D nuts on the firewall below the tank are all #12-24. Also I used the D nut located between the steering column and the cowl panel for a chassis ground, I believe it is a screw for the floor plates around the steering column and foot pedals.
 
THANK YOU ALL SO MUCH! You guys saved my backside on this project. 10-32 is the right size for my 30/31 firewalls. Factory D nut, and there is just no way to get a #12 in that hole. I'm glad I didn't assume the earlier models were the same before making the harnesses. It's odd that Mike's catalog says the 12-24 fits 30/31 firewall when it clearly won't work on either of mine.

Thanks,
Kyle
 
Snyder's catalog shows 10 - 32 D nuts as being in the cowl and door area and refers to pages 82 & 83 of How to Restore Your Model A, Vol. 2. Might want to check there to see what is going on.

John
 
You must log in or register to reply here.
Back
Top