A component assembly is described which consists of a component and an element attached to the component and formed as an alignment element. The element has a head part, a component contact surface provided at an end face of the head part and a collar arranged inside the component contact surface and projecting away from it. The collar has a cross-sectional shape which is non-circular. The collar is inserted with clearance into an aperture of the component formed complimentary to the cross-sectional shape of the collar and has outer surfaces which converge in the direction of the said end face of the head part and with respect to the central longitudinal axis of the element and form an acute angle with the latter. The marginal region of the aperture of the component adjacent to the component contact surface extends into recesses formed between the collar and the end face of the head part but does not reach the base of the recesses, with a free space arising which ensures a lateral alignment movement of the element relative to the component. An axial separation of the element from the component is prevented as a result of material overlap of the component material with the collar within the recesses. Elements and methods for manufacture of the component assembly are also claimed.

A component assembly is described which consists of a component and an element attached to the component and formed as an alignment element. The element has a head part, a component contact surface provided at an end face of the head part and a collar arranged inside the component contact surface and projecting away from it. The collar has a cross-sectional shape which is non-circular. The collar is inserted with clearance into an aperture of the component formed complimentary to the cross-sectional shape of the collar and has outer surfaces which converge in the direction of the said end face of the head part and with respect to the central longitudinal axis of the element and form an acute angle with the latter. The marginal region of the aperture of the component adjacent to the component contact surface extends into recesses formed between the collar and the end face of the head part but does not reach the base of the recesses, with a free space arising which ensures a lateral alignment movement of the element relative to the component. An axial separation of the element from the component is prevented as a result of material overlap of the component material with the collar within the recesses. Elements and methods for manufacture of the component assembly are also claimed.

Various embodiments of a fastener driveable into a substrate are provided. The fastener includes a head, a shank, and a helical thread formation. Portions of the shank and helical thread formations may be tapered. The outer diameter of the shank may decrease in a direction away from the head. An outer diameter of the thread formation may increase in a direction away from the head. The head may include a plurality of extending ribs. The helical thread formation may be formed with a plurality of grooves that are respectively each partially defined by a straight cutting edge. These improvements reduce torsional failure of the fastener from over tightening.

A system for use in providing a load on a bearing mounted to a shaft includes a preload apparatus having a first extension and a second extension engageable with an inner race of the bearing and configured to provide a compressive load to the bearing. The first extension has a first projection and the second extension has a second projection. A stop ring is configured to limit a radially inward movement of the first extension and the second extension toward each other to position the first projection and the second projection relative to the bearing.

A system for use in providing a load on a bearing mounted to a shaft includes a preload apparatus having a first extension and a second extension engageable with an inner race of the bearing and configured to provide a compressive load to the bearing. The first extension has a first projection and the second extension has a second projection. A stop ring is configured to limit a radially inward movement of the first extension and the second extension toward each other to position the first projection and the second projection relative to the bearing.

A locking fitting assembly that can be removably installed in a tapped hole on a housing and resists unintended loosening of the fitting assembly. The fitting assembly maybe installed at a mounting location for receiving the fitting assembly, and includes abase with engagement structure configured to engage corresponding structure adjacent the mounting location to secure the base against rotation. The fitting assembly further includes a nipple fitting received on the base and having first and second oppositely disposed coupling features. The first coupling feature is configured to mate with a complementary coupling feature of the housing, such as the tapped hole, whereby the nipple fitting can be sealingly secured to the housing. Locking structure disposed between the base and the nipple fitting is configured to resist relative rotation between the base and the nipple fitting.

A system for use in providing a load on a bearing mounted to a shaft includes a preload apparatus having a first extension and a second extension engageable with an inner race of the bearing and configured to provide a compressive load to the bearing. The first extension has a first projection and the second extension has a second projection. A stop ring is configured to limit a radially inward movement of the first extension and the second extension toward each other to position the first projection and the second projection relative to the bearing.

A system for use in providing a load on a bearing mounted to a shaft includes a preload apparatus having a first extension and a second extension engageable with an inner race of the bearing and configured to provide a compressive load to the bearing. The first extension has a first projection and the second extension has a second projection. A stop ring is configured to limit a radially inward movement of the first extension and the second extension toward each other to position the first projection and the second projection relative to the bearing.

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.

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.