Help with fitting

[power stroke 99]

Can someone tell me what the name of this fuel line fitting is. It is off of my D4 7U fual line. I want to remake the line and go to stainless steel.

[power stroke 99]

Can anyone tell me what the thread pitch is on the nut that threads into the hour meter where the fuel line goes in?

[CR]

tubing Ferrule

Here is a picture of an adapter I made years ago to adapt from the cat housing to -8 AN (-8 JIC) so I could use Aeroquip steel braided fuel hose... you know for that dragster look

The taper on the Cat fittings originally had two angles with a radius at the intersection. I'll have to dig through my notes for the info if you need it.

I got the info 1st from measuring multiple fittings on an optical comparator, then got the actual tooling & drawings from the former supervisor at the screw machine shop that was in San Leandro, CA

[SJ]

I don,t know if the correct name is ferrule but that,s what we called them at the shop.They may call them a sleeve but not sure as the picture I have isn,t too clear as to what it is.

[Old Magnet]

After screwing around with all kinds of fittings and adapters to match Cat's odd ball design I have found a -10 "O" ring boss fitting to what ever line or hose you want works just fine. The thread is 7/8-14.

[power stroke 99]

Thanks guys, I could have did all the leg work like you guys did, but I was certain someone already went down that road.

[power stroke 99]

tubing Ferrule

Here is a picture of an adapter I made years ago to adapt from the cat housing to -8 AN (-8 JIC) so I could use Aeroquip steel braided fuel hose... you know for that dragster look

The taper on the Cat fittings originally had two angles with a radius at the intersection. I'll have to dig through my notes for the info if you need it.

I got the info 1st from measuring multiple fittings on an optical comparator, then got the actual tooling & drawings from the former supervisor at the screw machine shop that was in San Leandro, CA

Do you remember where the second fitting in your picture was bought.

[CR]

Buy? I made the center fitting out of 316 Stainless steel on a hardinge lathe.

Why 316... Because I had it in hex stock at the time.


The top fitting is a 1/2" pipe to -8 JIC taper that I got from Motion Industries.

The bottom fitting came off an old caterpillar, probably in a junk pile.

The only issue you might run into using an O-ring boss fitting is the sealing surface of the o ring might end up on some uneven casting, you might have to do some hand lapping. It really should seat into a 15 degree boss with a minimum of a 8 microinch finish, however with the low pressure involved with a gravity fed fuel tank it should be fine. If you look at this thread http://www.acmocbb.org/ACMOC_BB/showthread.php?t=6829 you can see a picture of an aluminum manifold I made that accepts the O-ring boss fitting.

That being said there is nothing wrong with that fix. I have made plugs for my oil cooler (also 304 stainless) that use a captured face seal O-ring right onto the casting of the oil filter housing and it does hold 30 psi more pressure than the fuel tank.

[power stroke 99]

Buy? I made the center fitting out of 316 Stainless steel on a hardinge lathe.

Why 316... Because I had it in hex stock at the time.


The top fitting is a 1/2" pipe to -8 JIC taper that I got from Motion Industries.

The bottom fitting came off an old caterpillar, probably in a junk pile.

The only issue you might run into using an O-ring boss fitting is the sealing surface of the o ring might end up on some uneven casting, you might have to do some hand lapping. It really should seat into a 15 degree boss with a minimum of a 8 microinch finish, however with the low pressure involved with a gravity fed fuel tank it should be fine. If you look at this thread http://www.acmocbb.org/ACMOC_BB/showthread.php?t=6829 you can see a picture of an aluminum manifold I made that accepts the O-ring boss fitting.

That being said there is nothing wrong with that fix. I have made plugs for my oil cooler (also 304 stainless) that use a captured face seal O-ring right onto the casting of the oil filter housing and it does hold 30 psi more pressure than the fuel tank.

Ok thanks, I was looking on line and found the -8 JIC x -8 JIC bulk head fitting which is almost exactly like the one you machined out, looking at it and for the price I think I will buy it and see if it works also in 316 SS.

[Old Magnet]

The bulkhead fitting will work.....but not -8....as stated before it is a -10 size (7/8 inch -14 straight thread).
I tried it but I didn't like it as it sticks out way to far.

Oil filter/cooler plugs do not have to be fabricated and using pipe plugs is not a proper fit. I have found that you can use -10 "O" ring face seal fitting along with a "O" ring boss "O" ring (1 inch - 14 straight thread)