Fastener means

Claim 1

A ROTARY FASTENER FORMED OF SHEET METAL AND ADAPTED FOR ASSEMBLY WITH AN APERTURED SUPPORT PANEL COMPRISING, AN ELONGATED HEAD OF GENERALLY PLANAR CONFIGURATION IN SIDE ELEVATION, SAID HEAD BEING BENT ADJACENT EACH OF ITS OPPOSED ENDS TO FORM CONVEX SURFACES ON ITS UNDERSIDE WHICH EXTEND TRANSVERSELY THEREOF AND WHICH ARE ADAPTED FOR COACTING ENGAGEMENT WITH THE CONFRONTING SURFACE OF SAID SUPPORT PANEL TO FACILITATE ROTARY TURNING MOVEMENT OF THE FASTENER WHEN APPLIED TO SAID SUPPORT PANEL, AND EXTENDING FROM SAID HEAD, SAID LEG PORTIONS BEING SPACED LATERALLY FROM ONE ANOTHER THROUGHOUT THEIR LENGTHS TO PROVIDE TRANSVERSE RESILIENCY IN SAID SHANK, SAID LEG PORTIONS HAVING CONVEX EXTERIOR SURFACES IN A GENERALLY TRANSVERSE DIRECTION, THE TRANSVERSE DIMENSION OF SAID SHANK BEING AT LEAST AS GREAT AS THE TRANSVERSE DIMENSION OF SAID HEAD AS MEASURED IN THE SAME PLANE, EACH OF SAID LEG PORTIONS INCLUDING A SINGLE OUTWARDLY EXTENDING RESILIENT WING ON THE ONE SIDE THEREOF COMMENCING ADJACENT THE LOWER EXTREMITY OF THE RESPECTIVE LEG PORTION AND PROJECTING UPWARDLY TOWARD SAID HEAD, EACH OF SAID WINGS BEING CUT AWAY TOWARD ITS UPPER END SO AS TO BE SUBSTANTIALLY LATERALLY SPACED FROM ITS RESPECTIVE LEG PORTION, AND THE TERMINAL END OF EACH OF SAID WINGS BEING DISPOSED IN PREDETERMINED SPACED RELATION WITH RESPECT TO SAID HEAD, BOTH OF SAID WINGS BEING INWARDLY CURVED IN THE OPPOSITE DIRECTION RELATIVE TO A VERTICAL PLANE PASSING THROUGH SAID SHANK, TO FACILITATE ROTARY MOVEMENT OF SAID FASTENER IN THE OPPOSITE DIRECTION RELATIVE TO SAID CURVATURE UPON ASSEMBLY WITH SAID SUPPORT PANEL.