Abstract: A fastener assembly including a nut member frictionally temporarily affixed in an opening in a support member, and a bolt having a tightly wound helical spring shank. The nut member is formed with a threaded recess for receiving the spring shank, and compressible leading end segments which expand behind the supporting member when the nut is snapped in place. The nut member can be withdrawn if desired while the bolt shank is in threaded engagement with the nut. When so engaged, the flexible bolt shank can be moved in any direction to facilitate installation and removal of objects supported by a plurality of fastener assemblies.