| 摘要 |
A push-nut type fastener for use on a threaded stud comprises a thin planar metal plate having an aperture formed therethrough with its axis perpendicular to the plane of the plate. A first plurality of resilient fingers is formed integrally with the metal plate to extend radially inward from the periphery of the aperture at uniformly spaced locations with the inner ends of the fingers located generally on an imaginary circle having a diameter substantially less than the crest diameter but greater than the root diameter of the threaded stud. A second plurality of resilient finger members extends radially inward from the periphery of the aperture at locations intermediate the resilient fingers in the first plurality. The fingers in the second plurality are bent from the plane of the plate to extend outwardly therefrom and each finger in the second plurality terminates in a free end having a terminal edge which is on an imaginary cylinder coaxial with the aperture and of a diameter which is less than the crest diameter and greater than the pitch diameter of the stud. Moreover, each terminal edge extends on a helical path at a helix angle greater than the helix angle of the thread of the stud. |
