Versatile Compatibility -- NPT Male x NPT Female fittings are compatible with 3/8" flare x 3/8" NPT male pipe and 3/8" Male NPT x 3/8" NPT Female. Size: Brass Tube Fitting. Secure and Easy Connection -- Brass pipe fittings feature a half-union with a flared tube connection and a male NPT connection, making it easier to connect and disconnect two tubes than with a coupling.
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