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AN flare fittings

AN flare fittings

AN flare fittings

(OP)
I need the definition of flare angles of so-called 37 degree AN fittings. I believe that the male/female angles are not identical, but can't find the actual angles.

RE: AN flare fittings

If you want all of the dimensions you will need to buy the SAE standards for them.

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P.E. Metallurgy, consulting work welcomed

RE: AN flare fittings

SAE J514 is the standard for 37 degree flare fittings. The 37 degree angle is preferred for harder materials such as steel as they are prone to cracking when flared out to 45 degrees. The angles of the male and female ends should be the same. However, though it might not be good practice, you can install a 45 degree female flare on a 37 degree male fitting and it will seal. The reverse is not true.

RE: AN flare fittings

(OP)
Thanks for the help!

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