A rivet-like fastener adapted to be mounted in a hole provided through a wall , said wall having a forwardly-facing surface and an opposite rearwardly-facing surface , said fastener comprising: an elongated tubular body having a front end and a rear end, said body having a flange extending outwardly from said body adjacent said front end, said flange having a rearwardly-facing surface adapted to abut a marginal portion of said wall forwardly-facing surface about said hole , said body rear end having a rearwardly-facing surface , said body also having an inwardly-extending lug adjacent said body rear end, the axial extent of said lug being defined between said body rearwardly-facing surface and a forwardly-facing annular surface on said body ; a nut having a head portion and a collar portion extending forwardly from said head portion , said head portion having a forwardly-facing abutment surface adapted to face toward said body rearwardly-facing surface , said collar portion having an intermediate portion passing through said lug and terminating in a marginal end portion positioned forwardly of said body forwardly-facing surface ; characterized by a ring loosely surrounding said collar marginal end portion; and a retainer formed by bending or deforming outwardly said collar marginal end portion for preventing said ring from separating from said collar marginal end portion; and wherein radial space is provided between said body lug and said collar intermediate portion to permit said nut to move radially relative to said body . an elongated tubular body having a front end and a rear end, said body having a flange extending outwardly from said body adjacent said front end, said flange having a rearwardly-facing surface adapted to abut a marginal portion of said wall forwardly-facing surface about said hole , said body rear end having a rearwardly-facing surface , said body also having an inwardly-extending lug adjacent said body rear end, the axial extent of said lug being defined between said body rearwardly-facing surface and a forwardly-facing annular surface on said body ; a flange extending outwardly from said body adjacent said front end, said flange having a rearwardly-facing surface adapted to abut a marginal portion of said wall forwardly-facing surface about said hole , said body rear end having a rearwardly-facing surface , said body also having an inwardly-extending lug adjacent said body rear end, the axial extent of said lug being defined between said body rearwardly-facing surface and a forwardly-facing annular surface on said body ; a nut having a head portion and a collar portion extending forwardly from said head portion , said head portion having a forwardly-facing abutment surface adapted to face toward said body rearwardly-facing surface , said collar portion having an intermediate portion passing through said lug and terminating in a marginal end portion positioned forwardly of said body forwardly-facing surface ; characterized by a head portion and a collar portion extending forwardly from said head portion , said head portion having a forwardly-facing abutment surface adapted to face toward said body rearwardly-facing surface , said collar portion having an intermediate portion passing through said lug and terminating in a marginal end portion positioned forwardly of said body forwardly-facing surface ; characterized by a ring loosely surrounding said collar marginal end portion; and a retainer formed by bending or deforming outwardly said collar marginal end portion for preventing said ring from separating from said collar marginal end portion; and wherein radial space is provided between said body lug and said collar intermediate portion to permit said nut to move radially relative to said body . <EOS>