Abstract: A prosthetic joint connector assembly includes a pylon having a first end and an outwardly flared portion adjacent to a second end thereof. The second end of the pylon is closed by a convexly domed surface which forms a concave interior surface and has a generally axial opening formed therein. The prosthetic joint connector further includes a securing nut carried internally of the pylon and an abutment also carried internally of the pylon. The securing nut is defined by a cylindrical member having a first end and an outwardly flared portion adjacent to a second end which terminates in a convexly domed surface. The securing nut also has an internally threaded axial bore extending at least partially therethrough. The first end of the securing nut has a bearing surface for engaging the abutment such that the securing nut is interposed between the abutment and the concave interior surface of the second end of the pylon.