Abstract: A fitting assembly for a releasable connection with a distal tubing end. The fitting includes a generally annular body formed as having an internal bore with a radial surface describing an internal gland having a forward end wall defining a contact edge with the radial surface of the bore. A collet is journalled coaxially within the bore for translational movement within the gland of the body as having a generally cylindrical wall portion expandable to receive the tubing end therethrough. The wall portion is divided longitudinally into at least a pair of arcuate, cantilevered segment extending resiliently between respective distal and proximal ends. Each of the segments has an inner projection disposed adjacent the distal end thereof, and an outer camming portion which extends from a first rearwardly-inclined ramp surface to a generally-contiguous second rearwardly-inclined ramp surface.