Panel fastener system

An improved fastener system for insulated slab panels, the fastener being of the type having the first housing mounting a hook assembly and a second housing mounting a pin, the first and second housings being locked together via the hook assembly and pin, the hook assembly including a cam, a hook extending from the cam, and opposed extended hubs mounted transversely from the cam, said system in combination, comprising;

• walls disposed in said first housing forming a slot therein for receiving said hook member and for positioning said hook member for attachment to said pin of said second housing,
• means defining a recess disposed in each of said walls, said recess for receiving said hubs of said hook assembly for pivotable mounting,
• an inclined plane disposed in each of said walls for spreading out said wall means into a biased position when said hubs are moved along said walls towards said recess means, said walls being movable from said biased position to an unbiased position after said hubs have moved along said inclined planes to said recess means, whereby said hubs are positively captured in said recess means, and said hook assembly is resiliently locked within said first housing for rotatable movement therein, and
• biasing means disposed between said hook and said cam for providing positive contact therebetween, said first housing having an upright front wall facing said second housing, said wall including a pair of upright opposing walls spaced one from another to form said slot, said slot being disposed substantially vertically in said front wall, said recesses including a pair of annular bearing receptacles adapted to receive said hubs, said receptacles being disposed on opposite sides of said slot closely spaced to an inner surface of said front wall, said annular bearing receptacles including opposed hub receiving apertures formed in said opposing walls, and wherein said annular bearing receptacles further including a pair of opposed support members extending from the inner surfaces of said opposing walls, said support members forming hub receiving apertures coextensive with said annular bearing receptacles, said support members forming hub passages adapted to receive said hubs as said hubs are moved along said inclined.