GEWINDEBILDENDE MUTTER MIT SICHERUNGSABSCHNITT

摘要

An improved nut is secured to an unthreaded stud which is inserted through a central bore in the nut. The bore includes a guide means which provides alignment guidance during sliding insertion of the stud into the bore. The guide means preferably has an annular configuration with an inner diameter slightly larger than the diameter of the stud so that the initial insertion of the stud does not produce significant frictional resistance. The bore of the nut further includes a helical thread, preferably a single thread turn, which is disposed in the bore axially distinct from the guide means and terminates within the bore adjacent the guide means. The helical thread has a minor diameter smaller than the stud diameter and also projects radially inwardly into the bore further than the guide means. The cold-forms a mating thread impression into the periphery of the stud and the resulting thread impression obstructs any vibrational retraction of the guide means to promote retention of the nut on the stud.