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stainless steel hose

Stainless Steel Aircraft Braided Hose Assembly Tips


braided hose fittings

Here's what works best for me to assemble S/S braided lines with reusable AN fittings.

Be sure to review your pressure requirements, temperature range, and fluid compatibility to ensure the hose you select will properly handle the job.

stainless steel hose

There are several variations of these fittings available from several manufacturers. In this case we're using a stainless steel AN-8 fitting.

After I determined the correct AN Fitting size I need and the corresponding hose, I measure the desired length.

stainless steel hose
braided hose fittings

Wrap with duct tape or electricians tape where you'll make your cut (to keep it from fraying during cutting and assembly).

I use my band saw to cut to length. A piece of angle iron (clamped against the blade) makes a steady guide to hold the hose during cutting.

braided hose fittings
aircraft braided hose

Next I gently feather the inside liner with an exacto knife to remove any burrs.

Then I ensure the liner is round by gently shaping it with my needle-nose pliers.

aircraft braided hose
AN fittings

Ensure the liner has no frays on the outside. I use my heavy scissors (carpet shears) to trim and 'even up' the stainless steel braids around the outside.

Then slip the nut over the hose.

AN fittings

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stainless steel hose

Push the nut up past the tape.

Carefully unwind and remove the tape without letting the stainless steel braid unravel.

stainless braided lines
braided hose fittings

Carefully separate the steel braid around the edge of the hose liner. This is where the tapered cone will slip in.

Gently slip the tapered cone in place. Ensure it is slipped over the outside of the liner and is not cutting into it.

stainless steel hose
aircraft braided hose

Push it down against the bench to ensure it is seated all the way.

Gently feather off any rough edges on the inside liner to ensure the next piece will slip inside.

braided hose fittings
stainless braided lines

Insert the outer fitting shell.

Carefully make sure it's seated all the way in.

aircraft braided hose
AN fittings

Run the nut down onto the threads making sure you don't 'cross thread' it.

Tighten the nut with a socket and wrench without distorting it.

AN fittings
stainless steel hose

Another trick you can use is to clamp a six-point deep socket in the vice to hold the large nut, then use a wrench or crows-foot to tighten the nut without distorting it.

Here's the finished product. These ends can be reused many times.

stainless braided lines

I'm sure there are other ways to assemble stainless steel braided hoses, but I've found this procedure works well for me.

Be sure to pressure test all hoses, especially those used for critical and hazardous areas (lube oil, fuel, etc.) to ensure there are no leaks.

Ensure the hose is properly flushed out to prevent system contamination. More references.


stainless steel hose

Some tips for assembling Double Braided Stainless Steel Hoses

Ok. So you've sucessfully assembled a few stainless braided hoses. But I'm telling you this Double Braided Hose is a different animal.

After trying several differfent methods, here's what works well for me. Your milage may vary.

The first problem is locating the correct fittings. I finally located and ordered XRP Premium Hose Ends to fit some Double Braided Aircraft Hose I already had. In this example I'm installing AN-6 fittings for the power steering in my boat. Be sure to review your pressure requirements, temperature range, and fluid compatibility to ensure the hose you select will properly handle the job.

stainless steel hose

The first step is to wrap the spot where you will be making your cut with one wrap of electrical tape.

Then take three wraps of .045" safety wire on one side of the tape, three more wraps on the other side of the tape, and three more wraps against that. You'll end up with two safety wires against each other on one end of the electrical tape and one on the other end of the tape.

stainless steel hose
braided hose fittings

Using the metal cutting band saw in the vertical position, slowly and carefully slowly cut through the tape right next to the double safety wire.

Cleanup the edge of the rubber inside with a knife.

braided hose fittings
braided hose fittings

Clamp the hose horizontal in the vice with about 1.5" sticking out to the right (I'm right handed and can shove better from this side).

Grab the "fitting ring" with vice grips. Turning to the left, force it onto the hose up against the safety wire. While holding it onto the braid, clip the safety wire and continue to force it onto the braid (while turning to the left). Force it on (clip the second safety wire when it is in the way) until the "fitting ring" is seated all the way on.

braided hose fittings
braided hose fittings

Using a center punch, push into the "fitting ring" to align the liner.

Lube the fitting with "hose assembly lube" and carefully start the fitting threads into the "fitting ring". Use a 6-point socket (or tubing wrench) to tighten snuggly.

braided hose fittings

Blow out with high-pressure air, then leak test.


stainless steel hose

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braided hose fittings


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