Push-nut type fastener

A push nut type fastener for use on a threaded stud having a continuous helical thread formed on the exterior thereof, said spiral thread having a crest diameter D.sub.c and a pitch diameter D.sub.p, said fastener comprising;

• a thin planar metal plate having an aperture formed therethrough, said aperture having an axis perpendicular to the plane of said plate and maximum diameter substantially greater than D.sub.c ;
• a first plurality of resilient fingers formed integrally with said metal plate and extending radially inward from the periphery of said aperture, said first plurality of resilient fingers being spaced relatively uniformly about the interior of said aperture with the radially inner ends of said fingers locate generally on an imaginary circle having a diameter less than D.sub.c ;
• a second plurality of resilient finger members formed integrally with said metal plate and extending radially inward from the periphery of said aperture, said resilient fingers of said second plurality being spaced relatively uniformly about said aperture at locations intermediate said resilient fingers in said first plurality,
• said resilient fingers in aid second plurality being bent from the plane of said plate to extend outwardly therefrom at an angle .alpha. to said axis, each said resilient finger in said second plurality terminating in a free end having a terminal edge which is on an imaginary cylinder which is coaxial with said aperture and has a diameter which is less than D.sub.c and greater than D.sub.p, each said terminal edge extending on a helical path at a helix angle greater than the helix angle of the helical thread formed on said stud.