Abstract: This invention describes self-locking threaded fasteners having a patch or patches of fused high-temperature-resistant resin adhered to a portion of the threads, providing self-locking capabilities at temperatures above 400.degree. F., well beyond the range of temperatures attainable using prior art patch materials such as nylon. A process for making such fasteners by spraying finely-divided high-temperature-resistant resin powder onto the threads of a fastener also is claimed.

Abstract: A rivet setting tool having rack and pinion gear structure is disclosed. The rack is rectangular in cross-section and bears squared teeth on its upper face. A slideway is provided for movement of the rack and a wear plate is disposed within the slideway. The wear plate includes a base and a pair of upstanding spaced laterally disposed members projecting from the base and a downwardly depending portion at one end of the base. The base and upstanding sides abut the bottom and adjacent sides of the rack. The tool includes a body element having a plurality of spaced pairs of internally disposed bearing support openings. Each of the openings have square sides. Within each pair of adjacent bearing support openings a square-sided bearing is disposed which is also provided with an opening therewithin for receiving a pin.