the hose fitting art the wrenching nut 16 is of an annular configuration including an outer periphery 32 and an inner cylindrical bore 34 the periphery 32 is of a noncircular configuration preferably hexagonal defining a plurality of wrench engageable flats 36 the bore 34 is of a diameter only slightly greater than the normal outer diameter of the conduit 10 whereby the nut may be readily inserted over the end of the conduit and axially located thereon the lateral sides of the wrenching nut 16 are identically formed and each include an annular counterbore 38 of cylindrical form having a diameter as indicated at 40 the counterbores include a radial surface 42 and a plurality of recesses 44 are formed in the nut intersecting the surface 42 fig4 as will be appreciated from fig4 the recesses 44 four being shown in the illustrated embodiment within each counterbore are of semi circular configuration and include shoulder surfaces 46 which are of a generally radial orientation with respect to the center of the nut the surfaces 46 form abrupt transitions in the configuration of the nut surfaces 42 and serve as keying means capable of transmitting torque forces between the wrenching nut and the conduit to produce the assembly illustrated in fig1 and 2 the wrenching nut 16 is positioned upon the conduit 10 at a desired axial location relative to the end 26 thereupon the socket 12 is positioned adjacent the wrenching nut and the three component assembly is located within a press not shown which imposes an axial force upon the conduit 10 appropriate metal confining dies not shown are disposed adjacent the conduit and nut during the upsetting of the conduit and as the axial.