Threaded and non-threaded fastener improvements

Abstract From the Canadian patent

Most mechanical joints, both sealed and not sealed use either threaded fasteners such as conventional nuts bolts and set screws, or non-threaded fasteners such as conventional spring pins. Safety economy, reliability and environmentability of structures piping, systems, both portable and fixed their combination, mechanical, equipment power plants, jet liners, ships, etc. rely on the predictable performance of involved fasteners. Due to the variety of factors a predictable performance of, corresponding commercial fasteners is not always fully attainable. Such uncontrollable conditions as in-service thermal cycling vibration, metal flattening, metal fatigue human error, possible, malpractice, …