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Old 02-10-2020, 02:14 AM
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Q about 3/8-24 fitting with washer.

Hi
What's the purpose of the crush washers used on some of the 3/8-24 male adapter fittings like the ones on the enclosed photo?

Aren't these supposed to seal against the cone in the bottom of the IFF port?
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Old 02-10-2020, 05:32 AM
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Hmmmm,interesting,I would agree with your assesment.but lets wait for an expert to chime in.

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Old 02-10-2020, 06:23 AM
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My Q no 2 that I forgot in my first post:

If the fittings reach down the cone in the bottom of the female port without the washers, is it ok to use these fittings without washers then?
Or will the washers create a better seal?

Last edited by staleg; 02-10-2020 at 06:36 AM.
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Old 02-10-2020, 07:34 AM
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In a perfect world every tolerance would be perfectly machined and every manufacture would make sure that those guidelines are followed. On your end you would make sure to use the perfect amount of torque seating that male against that female surface perfectly every time.

But as that is not the case we have our good old crush washer to provide some backup sealing in the event the machining surface is not perfect, or somewhere from manufacture to car the thing is dropped, or you simply do not clean the surfaces perfect before installation.

The crush washer is there for backup.

I absolutely hate banjo fittings because they rely fully on a crush washer(s) as the only means for sealing. When you get cheap calipers for instance it becomes evident rather quickly just how important having good face surfaces are to make that seal. That being said the little piece of copper does a great job at conforming to uneven surfaces to a point.
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Old 02-10-2020, 12:01 PM
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Ok, thanks.

One more question while I'm at it:
My -3AN Russel DOT brake hoses have been in use for 6 years now.
What's the expected life span on these?
They looks perfectly fine with no kinks og other visible wear signs.
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