Abstract: A pipe joint and threaded pin and box members adapted for use therein are disclosed in which two-stepped thread surfaces are axially separated by dissimilar angled positive angle torque and sealing surfaces and internal and external sealing surfaces are provided on both ends of the threaded surfaces. Protective non-engaging shoulders are provided adjacent the external sealing surfaces. Cooperating end shoulders are provided on the end of the pin member and the interior end of the counterbore of the box member. Preferably the end shoulders are provided approximately perpendicularly to the internal sealing surfaces, the box end shoulder acting to trap the pin end shoulder under conditions of high joint interior pressure.