Abstract: Disclosed herein are prevailing torque type self-locking nut comprising a one-piece nuts each body having an internal screw thread surmounted by a well portion having an internal surface spaced from the thread axis a distance greater than one-half the major thread diameter, and a thin-walled self-locking element of thread impressionable thermoplastic material at least partly in the well portion and having an external surface secured by adhesion to the internal surface of the well portion and an internal surface spaced from the thread axis a distance less than one-half the major thread diameter. Also disclosed herein are a method of making such nuts, the method involving melting powder of the thermoplastic material in situ in the nut body, a pin useful in carrying out the method and nut body components of the self-locking nuts.

Abstract: Disclosed herein is a prevailing torque type self-locking nut comprising a one-piece nut body having an internal screw thread surmounted by a well portion having an internal surface spaced from the thread axis a distance greater than one-half the major thread diameter, and a thin-walled self-locking element of thread impressionable thermoplastic material at least partly in the well portion and having an external surface secured by adhesion to the internal surface of the well portion and an internal surface spaced from the thread axis a distance less than one-half the major thread diameter. Also disclosed herein are a method of making such a nut, the method involving melting powder of the thermoplastic material in situ in the nut body, a pin useful in carrying out the method and a nut body component of the self-locking nut.

Abstract: Disclosed herein is a bolt retainer for use as a component of an access panel fastener. The retainer comprises a grommet having an axial end and an aperture in open communication therewith. The grommet has a radial shoulder surface facing away from the end of the grommet which also has an internal surface extending toward the end of the grommet from the radially inner edge of the radial shoulder surface. The disclosed retainer has only two discrete retaining jaws in the aperture adjacent the radial shoulder surface and spring means biasing the jaws toward the axis. Each jaw is C-shaped and is substantially 180.degree. in circumferential extent. Each jaw also includes a boss adapted to enter the cylindrical surface of the grommet to limit jaw opening and the jaws present to the bolt a configuration of greater axial length than the pitch of the bolt thread.