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.