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.

A fixing washer comprising: an outer portion and an inner portion, the outer portion is radially outward of the inner portion and the inner portion defines a recessed region which is arranged, in use, to receive a head of a fastener, and the washer also comprises a number of channels, each of said channels extends though the inner portion and the outer portion.

A fixing washer comprising: an outer portion and an inner portion, the outer portion is radially outward of the inner portion and the inner portion defines a recessed region which is arranged, in use, to receive a head of a fastener, and the washer also comprises a number of channels, each of said channels extends though the inner portion and the outer portion.

An internal connector system of structural member includes a locking screw with a screw thread. A connector block includes a first bore hole sized and shaped to receive at least a portion of the locking screw, and the connector block is configured to engage with a bolt thread of a bolt. A lock plate has a plate thread that is configured to engage the screw thread of the locking screw. Tightening the locking screw causes the connector block to expand the lock plate.

An internal connector system of structural member includes a locking screw with a screw thread. A connector block includes a first bore hole sized and shaped to receive at least a portion of the locking screw, and the connector block is configured to engage with a bolt thread of a bolt. A lock plate has a plate thread that is configured to engage the screw thread of the locking screw. Tightening the locking screw causes the connector block to expand the lock plate.

An apparatus for providing a load on a bearing mounted to a shaft includes an attaching member releasably connectable to the shaft. A press mechanism is coupled to the attaching member and is configured to provide a compressive load to the bearing. An optical sending unit is configured to output a high intensity light to allow a user to locate a shaft slot of the shaft to align the press mechanism relative to the shaft when the attaching member connects to the shaft.

An apparatus for providing a load on a bearing mounted to a shaft includes an attaching member releasably connectable to the shaft. A press mechanism is coupled to the attaching member and is configured to provide a compressive load to the bearing. An optical sending unit is configured to output a high intensity light to allow a user to locate a shaft slot of the shaft to align the press mechanism relative to the shaft when the attaching member connects to the shaft.

A nut is prevented from turning during screwing by a body attached to one of the parts to be tightened by rivets. The body prevents the nut from rotating via a ring coupled without clearance with the nut and coupled with radial clearance to the body, in order to allow the nut to self-position itself along the axis imposed on the screw by the bores traversed by the screw. The nut can thus be a standard nut or a floating cage nut. Application to the retaining of nuts that are inaccessible and/or require a high level of security against unintentional unscrewing.

Disclosed is a fastener assembly to avoid accidental loosening due to vibrations. The fastener assembly includes a circular profiled locking washer and a lock nut. The locking washer is detachably attachable to an arm. The locking washer provides a plurality of leaf-shaped grooves on a first surface, and a central axial aperture for receiving a threaded shaft. The lock nut further provides a plurality of spring loaded balls on a surface facing the first surface of the locking washer. During operation, the lock nut is tightened on the threaded shaft by rotating in clockwise direction, and cessation of rotation, latches the plurality of spring loaded balls with the plurality of leaf-shaped grooves to lock the lock nut, and hence to withstand counter-rotative torque on the lock nut caused by vibrations.

An anti-loosening device for a fastening unit of a motor-vehicle wheel is configured to be coupled with a wheel hub. The anti-loosening device is configured to be arranged within the wheel hub along an axial direction, so that a main axis of the anti-loosening device coincides with the wheel axis. The anti-loosening device includes a gear arranged to cooperate with inner teeth of the wheel hub, an elastic element extending axially with respect to the gear, and a coupling element obtained on a sector of said gear, arranged to receive a corresponding fastening. During assembly of the wheel—hub assembly, the anti-loosening device is arranged to create a compressed configuration, wherein the gear is decoupled with respect to the inner teeth, and is arranged within a cavity portion obtained on the inner surface of the wheel hub, so as to allow rotation of the anti-loosening device around the main axis.