To provide a fitting assembly.

A drive nut 918 for a fitting includes an interior socket centered on a central axis and configured to receive at least a rearward portion of a conduit gripping member. The socket is defined by a radial drive surface 932 positioned to engage the conduit gripping member during pull-up, a first tapered longitudinal surface 940 radially outward of the drive surface and a second tapered longitudinal surface 934 between the drive surface and the first tapered longitudinal surface. According to one inventive aspect, one or more fitting component engaging surfaces may be configured to reduce radial reaction forces between two contacting fitting components of a pulled-up fitting.