Patent ID: 11885365
Assignee: nan
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F | IPC F

Claim 28:
29. An apparatus described in claim 20 hereinabove, said rivet nut trailing portion further comprising, opposite the counterbore cavity, an outer surface including knurling parallel to the longitudinal axis of the counterbore cavity for contacting the edge of the substrate hole for resisting rotation of the rivet nut anchored in the substrate hole, wherein, while the rivet nut insertion portion is mated with the installation tool before anchoring of the rivet nut in the substrate hole, the installation tool applies reverse axial pulling to the insertion portion causing such anchoring by collapsing of the trailing portion including knurling, resulting in formation of an outstanding annular bulb crimping the substrate between the head and the knurling of the bulb.