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10-14-2020, 04:18 PM | #1 |
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11-A Distributor Thread Size
I have a stripped thread on a distributor I am overhauling. What is the thread size of the vacuum connection?
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10-14-2020, 04:23 PM | #2 |
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Re: 11-A Distributor Thread Size
3/8 -24 UNF. 99% sure can anyone confirm?
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10-15-2020, 07:29 AM | #3 |
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Re: 11-A Distributor Thread Size
NO expert BUT being a brass fitting/tube wouldn't it be a "NPT" or a National Pipe Thread because "Machine" threads do not "seal" so you couldn't seal the "vacuum" with a machine thread!!! MY "guess" would be a 1/8th NPT or 1/8 National Tapered Pipe Thread!!! AS I said....MY GUESS
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10-15-2020, 07:41 AM | #4 |
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Re: 11-A Distributor Thread Size
Rock, no, mate, I just went and checked, it is the fitting for a 3/16 tube, which is 3/8-24 UNF.
A 3/8-24 tap screws in nicely but a 1/8 NPT barely starts and goes tight straight away. It was late when I posted last night, but was able to do a physical check today. The nut has a tapered end which bites into the pipe. Mart. |
10-15-2020, 07:43 AM | #5 |
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Re: 11-A Distributor Thread Size
If you've stripped it, you could go 1/8 NPT and use an adaptor to get back to 3/16 tube.
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10-15-2020, 07:45 AM | #6 |
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Re: 11-A Distributor Thread Size
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10-15-2020, 07:51 AM | #7 |
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Re: 11-A Distributor Thread Size
Here is the fitting it takes I think.3/8 24 as Mart said
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10-15-2020, 08:01 AM | #8 | |
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Re: 11-A Distributor Thread Size
Quote:
__________________
John "Never give up on what you really want to do. The person with big dreams is more powerful than one with all the facts". Albert Einstein |
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10-15-2020, 08:28 AM | #9 |
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Re: 11-A Distributor Thread Size
Mart, wouldn't any adapter require a provision to seal the original 3/16 fitting. I think it is going to require some measure to repair the existing threads or switching to some other method to seal the 3/16 tube with the adapter. Unless there is an adapter that provides the seat required for the original fitting.
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10-15-2020, 10:51 AM | #10 |
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Re: 11-A Distributor Thread Size
That was Ford's original compression fitting that was used clear up into the 60s at least.
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10-15-2020, 11:42 AM | #11 |
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Re: 11-A Distributor Thread Size
I've always known them as "Ford Nuts".
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10-15-2020, 11:59 AM | #12 |
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Re: 11-A Distributor Thread Size
Ya, I would really think hard about any attempt to tap it out to a different size, could really open up a can of worms.
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10-15-2020, 12:55 PM | #13 |
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Re: 11-A Distributor Thread Size
Ford used a lot of unusual thread sizes and pitches. At our shop we aways save any "left over" nuts and bolts. We have several coffee cans of them, and have been glad we did.
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11-08-2020, 04:15 PM | #14 |
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Re: 11-A Distributor Thread Size
Thank you to all who replied. I have now re cut the thread back to 3/8”x24 UNF, not perfect but with thread sealant it will be OK. Best regards Roger.
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