Often we receive inquiries on "9/16 female" fittings.
The standard 9/16 female does NOT fit everywhere, please have look to some pics here. We hope they are self explaning
On the regulator style UNF 9/16 a standard female 9/16 fitting may NOT seal safe! You see the o‐ring is NOT proper in the shoulder of the female adapter, also below is still threadedpart, this o-ring can never seal safe and correct!! |
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Compare it to a proper male 9/16 fitting. It closes and seals correct and safe
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For regulator style male 9/16 threads it is safer and better to use an inner sealing system with a stem an free rotating nut.
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Also for a QC6 for
example connected to such a male 9/16 UNF....a stem style fitting is
needed! This seals nice and safe....
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