A retainer assembly for being secured to a panel with said retainer assembly received by a slot defined by the panel, said retainer assembly including: a base defining a bore for receiving a screw; a pair of front support members in spaced apart relationship with one another and connected to one another at a front connection and a pair of back support members in spaced apart relationship with one another and connected to one another at a back connection each pair having a first section connected to said base and a second section extending from said first section and at least partially overlying said bore wherein at least a portion of each of said front and back support members is resiliently flexible for flexing said front and back support members outwardly against the panel in response to being engaged by the screw to secure said retainer assembly to the panel; and a front primary retention member extending outwardly from said front connection and a back primary retention member extending outwardly from said back connection each for limiting movement of said retainer assembly relative to the panel prior to the screw being extended through said bore, characterised in that said retainer assembly includes a pair of front secondary retention members each extending outwardly from said first section of one of said front support members and a pair of back secondary retention members each extending outwardly from said first section of one of said back support members with said front and back secondary retention members terminating closer to said base than said front and back primary retention members (68, 70) to establish an interference fit between said retainer assembly and said panel when said retainer assembly is received by the slot for preventing slop between said retaining assembly and the panel prior to the screw being extended through said bore. a base defining a bore for receiving a screw; a pair of front support members in spaced apart relationship with one another and connected to one another at a front connection and a pair of back support members in spaced apart relationship with one another and connected to one another at a back connection each pair having a first section connected to said base and a second section extending from said first section and at least partially overlying said bore wherein at least a portion of each of said front and back support members is resiliently flexible for flexing said front and back support members outwardly against the panel in response to being engaged by the screw to secure said retainer assembly to the panel; and a front primary retention member extending outwardly from said front connection and a back primary retention member extending outwardly from said back connection each for limiting movement of said retainer assembly relative to the panel prior to the screw being extended through said bore, characterised in that said retainer assembly includes a pair of front secondary retention members each extending outwardly from said first section of one of said front support members and a pair of back secondary retention members each extending outwardly from said first section of one of said back support members with said front and back secondary retention members terminating closer to said base than said front and back primary retention members (68, 70) to establish an interference fit between said retainer assembly and said panel when said retainer assembly is received by the slot for preventing slop between said retaining assembly and the panel prior to the screw being extended through said bore.