Large hex nut
 

Found a large hex (gland) nut and wonder if it is used somewhere on the Model A Ford or T.

Course thread 1 3/16 id, 1 3/4 od. Recessed slightly on one side. Can’t locate it in Snyder catalog. Looks very old. Any ideas?

Re: Large hex nut
 

A picture would help. Could it be for the inside sediment bowl nut?

Re: Large hex nut
 

Picture would be helpful?

Re: Large hex nut
 

Something like this? A-4634

Re: Large hex nut
 

Maybe the nut used on the sediment bowl that secures it to the inside of the firewall?
Marshall

Re: Large hex nut
 

Castle nut used to hold the clutch-pac to the transmission input shaft on the early Multi-plate clutch?


Joe K

Re: Large hex nut
 

The original (not the flimsy serrated repo) sediment bowl/bulb nut does have a recess on one side to go over the rounded end of the threaded "nipple" extending through the firewall to secure it better. A photo with the nut lying next to an identifiable Model A part would provide scale to judge its relative size. But I'm pretty sure this is a sediment bulb nut, given the unique recess on one side only. Why else would that recess be there on such a large nut?
Marshall

Re: Large hex nut
 

That nut is 1 1/4" OD.

Re: Large hex nut
 

Would post a picture but I can’t find a way to attach a photo that I did upload in the album section. Doesn’t seem user friendly.

I looked at the old style sediment bowl hex nut inside the car and it’s way too small. All others shown in the Snyder Catalog are much smaller. Sorry that I led y’all on a wild goose chase.

Thanks to all for your posts!

Re: Large hex nut
 

Here's the picture.

Re: Large hex nut
 

The closest nut I see in the parts book is A-21951 1 1/8-16 9/16" thick 1 11/16'' OD Dual high power take off gear nut.

Re: Large hex nut
 

Bob C, thanks for getting the picture up for me. I found the nut when going thru a tray of nuts and washers. Thought it might be Model A or T related. By close measure it appears to be 1 1/4 inch id. So it could be pipe related — also a course thread.

But it did look kind of Model A era to me.

Re: Large hex nut
 

Looks to me to be the nut used on the pinon gear sleave in the differential. There are two used to adjust the bearing pre-load and to lock together.

Tom Endy

Re: Large hex nut
 

Quote: "Would post a picture but I can’t find a way to attach a photo"

Go to the bottom of the thread,
Click on "Go advanced"
Near the top, click on the paper clip icon (attachments)
A little screen (Manage attachments) will appear,
Click on: "choose file"
Simples

Re: Large hex nut
 

Yes it could be a pipe lock nut. https://www.mcmaster.com/4638K616/

Re: Large hex nut
 

Bob C, thanks again. That looks like it and the od is exactly 1 3/4 inches!

Re: Large hex nut
 

Looks like a Model T Holley G bowl nut.