A fluid connector fitting nut lock includes a sleeve that fits down over the nut and that has an integral locking mechanism to fix the sleeve in a raised position that allows the nut to be turned and in a locked position that prevents the nut from backing off due to vibration or other external forces. The integral locking mechanism eliminates the need for a separate lockwire or clipwire.
Bolt material is orbitally swaged into recesses in the clip while simultaneously swaging bolt material over the clip to develop a torsional interference lock and an axial interference lock, respectively between the clip and the bolt. The recesses are arc shaped, have a center of curvature on a circle having a smaller diameter than a circle that defines lands between the recesses, and number between six and eight.
A self-locking fastener system comprises a pin for receipt in a hole in a workpiece and having an external thread which mates with a collar having an internal thread for carrying a tensile load. A plurality of helically extending flutes in the external thread on the pin collectively extend approximately one full revolution around the circumference of the thread. The collar has three longitudinally extending lobes for driving by a deltoid driver socket. When a desired clamp-up load is achieved on a workpiece, the socket plastically deforms the lobes and collar material radially inwardly thereof so that some of the collar material inwardly from each lobe is displaced into the void volume created by a helical flute. This displaced collar material inhibits unscrewing of the collar from the pin.