Abstract: A system including means for reducing or prohibiting a loosening of a threaded fastener, in which the threaded fastener comprises at least one or more nuts and a threaded bolt.

Abstract: A self-retaining fastener is designed to persistently secure a load between a nut and a bolt. The bolt has a bolt head, a bolt shaft, and a male threaded portion positioned along the bolt shaft to which a female threaded portion of the nut is secured. A retention spring is pressed against the nut and coiled around the bolt shaft when the nut is secured to the bolt. A first end of the retention spring is compressed against the nut opposite the load, while a second end of the retention spring is attached to a receiving volume of the bolt. The retention spring secures both the nut and load independent of the position the nut takes along the male threaded portion of the bolt. A bolt spring and a nut spring may also be used to provide increased contact area between bolt and load and between nut and load respectively.

Abstract: A self retaining nut which has an aperture with internal threads positioned within the aperture, and a longitudinal slot intersect at least some of the internal threads. A bowed spring is positioned within the slot and is compressed as the nut is placed on a bolt to retain the nut on a bolt.

Abstract: A self retaining fastener which comprises a threaded bolt with an hexagonal head and threaded shaft with a longitudinal groove formed therein. An arcuate spring member is secured in the groove and protrudes slightly outward from the threaded shaft of the bolt to provide frictional force against the inner surface of a bore. A further embodiment of the invention provides a threaded shaft cut into segments by one or more diametrical slots. The segmented portion of the shaft is biased outward to a diameter slightly greater than that of the unsegmented portion, providing resilient frictional force when inserted into an appropriately sized bore.