1936 Series 40 Connecting Rod Castle Nut

[Rock10]

Any idea where we can find a castle nut for a connecting rod bolt for a 36 series 40?

[JFranklin]

Maybe give us the size not application. I and others have buckets of castle nuts and bolts.

Edited April 16, 2022 by JFranklin (see edit history)

[Rock10]

It's a 3/8 - 24 castle nut about 1/2" tall.

I'll get pics tomorrow.

[Rock10]

Here is an example of what I need.

 

[hidden_hunter]

McMaster car sells most sizes

 

https://www.mcmaster.com/castle-nuts/

 

Try this one

https://www.mcmaster.com/97190A120/

 

Shohuld be able to find something that works there

 

Edited April 17, 2022 by hidden_hunter (see edit history)

[Rock10]

Doesn't look like they are tall enough. Needs to be almost 1/2" tall.

 

Edited April 18, 2022 by Rock10 (see edit history)

[Oldtech]

Do you know an Aircraft mechanic? He will have one or two in his pocket.

[EmTee]

11 hours ago, Rock10 said:

Doesn't look like they are tall enough.

Can the nut be installed with a flat washer to increase the height?

[Rock10]

6 hours ago, Oldtech said:

Do you know an Aircraft mechanic? He will have one or two in his pocket.

No I don't. 🙁

[Rock10]

27 minutes ago, EmTee said:

Can the nut be installed with a flat washer to increase the height?

I suppose it could, but I was hoping someone would have a spare.

[Robert Engle]

I have a number of them from 1932 50 series engines.  They are 3/8-24TPI, 9/16" hex, 15/32" heigth.

How many do you need?

 

You can have them for shipping costs.

 

PM me if interested

 

Bob Engle

[Rock10]

Done.

Thanks

[Rock10]

Thank you so much Bob.

I really love this forum. 🙂

[Rock10]

Just to wrap this thread up, we got the right nut and got the bottom end all buttoned up ready to install the oil pan.

The attached pic shows the correct castle nut and the one that was on our car when we took it apart.

Thanks again to Bob Engle and everybody who helped.

[JFranklin]

Thanks for the update, I see it had a cinch nut, probably ok when first used. I used a variety (aircraft) of that type on my Model A Ford. One advantage over a castellated nut is you can bring up to torque and done, No messing with going to the next slot or loosening some. And of course you don't need to play with, or find, a cotter in the pan.

Edited April 29, 2022 by JFranklin (see edit history)