My bulkhead fitting

WZ JUNK · November 30, 2007, 06:06:45 PM

I do not like bulkhead fittings. There are eight more connections and eight more place to leak. I do not like to use grommets, as they are not as neat appearing. So I made one of these to pass the hoses through the firewall on a car that I am building. The radiator hoses just pass through a hole and they are not a problem but the big metal ends on the air condition hoses keep you from just passing the hose through a hole. That is why the panel is split. After the firewall is drill and the hoses made up and installed, the panel goes on and is held in place by two studs threaded into the back of the plate. I wanted to counterbore the allen head cap screws but I did not have a tap the size of the smaller cap screws and so I did it this way. The two cap scres will be on the bottom and the hoses should hide them. All the holes are very slightly chamfered to keep from cutting the hoses and they are a very tight fit. I will take a picture after I make up the lines and place it on the car. Keep in mind that I do not have a mill, lathe, or any other fancy tools. My stuff is made by the Burt Monro method.

enjenjo · November 30, 2007, 06:33:05 PM

Nice job John. Could you countersink the bolt heads into the plate, or are they too large?

kb426 · November 30, 2007, 06:38:42 PM

I like it. I may do the same on the 32. I feel the same way about more connections. I have a mill.

rooster · November 30, 2007, 06:45:36 PM

I like it to. Its all thats needed. You wouldent

have to buy all those special fitting either.

WZ JUNK · November 30, 2007, 07:01:24 PM

Quote from: "enjenjo"Nice job John. Could you countersink the bolt heads into the plate, or are they too large?

I used #10 allen head cap screws and the heads are about 1/4" in diameter. The plate is 1/4" thick so I could not couter bore for the heads. I guess I could countersink and use screws and I my do that just to clean it up. Next one I make, I may use #6 screws.

John

wayne petty · November 30, 2007, 07:19:31 PM

hmm... countersink.... looks like there is room to counterbore it and sink the entire cap screw head into the lower half...it might be thin on the sides but it would hide it ...

unless you plan on using the clamp screws to mount it to a bracket to support it agenst the firewall

just a thought...

nice job.....

phat rat · November 30, 2007, 07:21:56 PM

Nice job John,. But what is the Burt Monro method?

Charlie Chops 1940 · November 30, 2007, 07:37:49 PM

John,

How long does the part under the thread need to be? I have some s/s flat head 10-32 allens that are 1" from the flat to the end of the screw. They can be spun to lose some of the head diameter also.

If they will work I'll shoot you a few in an envelope.

Charlie

UGLY OLDS · November 30, 2007, 07:54:59 PM

John...I Like It :!:

If its ok by you a piece just like that is gonna appear on my Model A....

WZ JUNK · November 30, 2007, 09:49:53 PM

Quote from: "Charlie Chops 1940"John,

How long does the part under the thread need to be? I have some s/s flat head 10-32 allens that are 1" from the flat to the end of the screw. They can be spun to lose some of the head diameter also.

If they will work I'll shoot you a few in an envelope.

Charlie

Thanks for the offer Charlie but I will dig around in the shop some tomorrow morning and see what I come up with. I was so stuck on counter boring for the allen head screws that I forgot I could counter sink the screws. I like that idea.

John

enjenjo · December 01, 2007, 07:14:42 AM

You could also cut down the diameter of the *10 screw heads.

C9 · December 01, 2007, 09:05:12 AM

Looks good, nice job.

Buttonhead allens?

They would be somewhat hidden by their small head size and being under the hoses.

WZ JUNK · December 01, 2007, 12:47:34 PM

Here it is on the car.

John

rooster · December 01, 2007, 02:33:11 PM

Very neat appearance. Good job.

nzsimon · December 01, 2007, 03:21:54 PM

That is so cool made with an armstrong mill