Abstract: An anti-loosening bolt and nut assembly includes a bolt, a nut, and a locking member. A screw rod of the bolt has an upper portion formed with an external thread and a lower portion formed with a retaining section. The nut has an upper cavity formed with an internal thread and a lower portion formed with a locking section. The locking section has elasticity. When the locking section is pressed, the locking section is in tight fit with the retaining section. The locking member is sleeved on the locking section. The locking member has an inner cavity with a tapered section. When the locking member is rotated, the nut is moved axially for the tapered section to be pressed against the locking section tightly. The bolt and nut assembly provides an anti-loosening effect, has few parts, and can be operated easily in a narrow space.

Abstract: A nut locking system comprising a nut, a shaft and a retaining ring, wherein the nut is connected to the shaft by means of a threaded joint, the shaft comprising a hollow section in which a body of the retaining ring is arranged, wherein the retaining ring comprises a tongue, the tongue being configured to engage the nut in response to movement of the nut relative the shaft in an axial direction thereof such that movement of the nut is restricted, wherein the tongue comprises a first tongue portion extending over an upper portion of the nut, the first tongue portion being configured to engage with the upper portion of the nut.

Abstract: A lock nut system includes a nut having a retaining member which includes locking teeth configured to engage with the lock nut teeth. The retaining member is rotatable in both a clockwise or counterclockwise direction a preselected distance to allow the locking teeth to mesh with the nut teeth so the lock nut can be locked into position on the shaft without further rotation or other adjustment of the nut.

Abstract: A captive screw, comprising: a screw; a press fit nut, to connect to an opening on a device and to accept a screw, including: a bottom portion, to extend through the opening; a top portion; and a middle portion, wherein the middle portion is smaller in circumference than the top portion and the bottom portion; and a sleeve including a protrusion, wherein the sleeve fits over the screw and attaches to the press fit nut via the protrusion.

Abstract: A lock nut and tang washer mechanism preloads and locks components in a rotating environment. A drive system mechanism preloads and locks the device in a rotating environment and provides a double locking safety requirement needed in most aircraft for applications operating in an enclosed environment. The mechanism holds a required torque for the duration of the drive system operating life without the need for periodic visual inspections.