Tubing nuts at carb
 

Please school me on the special fittings on my holley carb, both fuel and vacuum. In the past I have been guilty of threading tapered pipe fittings into carbs and fuel pumps in order to get something running. For years I have saved the brass nuts ford used and employ them when I can. I now find myself with a really nice Holley 847 from ebay and none of those special nuts. I have done a search on google and the barn with no results as I don't know what they are called. Thanks in advance, Gary

Re: Tubing nuts at carb
 

I always heard them called Ford nuts. You can buy them from Third Gen Automotive https://thirdgenauto.com/product/new...-fittings-1-4/.

Ken

Re: Tubing nuts at carb
 

If you all are referring to the current "ferrel" nuts sold by several vendors, I have found them to not seal as well as originals. I have had to tighten, loosen and tighten severas times to get them to seat right.

Re: Tubing nuts at carb
 

If you are a V-8 Club member, you might be interested in the latest issue of the V-8 TIMES (Sept/Oct) as it has an article about Ford fuel pumps and talks about fittings and lines. Has a great picture of nuts and fittings.
The issue is at the printers now and should be mailed early October.
Otherwise, if a member, you could look at the digital version of the article now as it is available online (need to be a member of the Club to have access).

Re: Tubing nuts at carb
 

Search of Edelmann's part number 108400 will usually find both reasonable and high $ sources for the Ford nuts.

Re: Tubing nuts at carb
 

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Here ya go! Third Gen and Mac VanPelt have these.


Weatherhead (Eaton) 6100x3

https://www.fordbarn.com/forum/attac...7&d=1646751889


https://www.fordbarn.com/forum/attac...8&d=1646752980

Coop

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Re: Tubing nuts at carb
 

Fuel would be weatherhead 59x4. Napa has them. Believe Napa has the vacuum affair as well. At least some do.

Re: Tubing nuts at carb
 

Thanks all! We have napa on the island so I will try them first. This forum is a great community to be part of.

Re: Tubing nuts at carb
 

Over time the size of the vacuum tube changed in diameter and so did the vacuum fitting but all the years the original fittings were 1/2" hex head pre war. Today the original size is hard to find, they are now made with 7/16" hex head.

Re: Tubing nuts at carb
 

There seems to be some mixing up of the vacuum nuts with the fuel inlet nuts.

Vacuum nuts have a 3/8 unf thread and a 3/16" hole.

Fuel inlet nuts have a 1/2" UNF thread and a 1/4" hole. Some are sold with a captive ferrule. These do not work as well as those that use a separate 1/4" ferrule, known in some areas as an olive. You can pull the captive ferrule out and use the nut with a separate ferrule, which works better.

Mart.