A hub lock nut assembly for retaining a vehicle wheel hub in position. The hub lock nut assembly comprises a hub lock nut and a mating component. The hub lock nut comprises a circumferential inner wall defining a central hole, the inner wall having a threaded portion separated into a first section and a second section by an annular groove, thereby configuring the second section as a resilient portion arranged to flex with respect to the first section in an axial direction. The mating component comprises an inner wall defining a central hole extending in the axial direction, an annular end surface, and a protrusion on the annular end surface. The protrusion is configured to exert a force on the second section of the hub lock nut threaded portion, in the axial direction, when in the mated position, thereby retaining the vehicle wheel hub in position.

A hub lock nut assembly for retaining a vehicle wheel hub in position. The hub lock nut assembly comprises a hub lock nut and a mating component. The hub lock nut comprises a circumferential inner wall defining a central hole, the inner wall having a threaded portion separated into a first section and a second section by an annular groove, thereby configuring the second section as a resilient portion arranged to flex with respect to the first section in an axial direction. The mating component comprises an inner wall defining a central hole extending in the axial direction, an annular end surface, and a protrusion on the annular end surface. The protrusion is configured to exert a force on the second section of the hub lock nut threaded portion, in the axial direction, when in the mated position, thereby retaining the vehicle wheel hub in position.

A bolt includes a shank having a first end, a second end, a first external thread proximate to the first end, and a second external thread proximate to the second end. The first external thread twists in a first direction, the second external thread twists in a second direction, and the first direction is different from the second direction. The first external thread includes a minor diameter, the second external thread includes a major diameter, and the minor diameter of the first external thread is greater than the major diameter of the second external thread.

A bolt includes a shank having a first end, a second end, a first external thread proximate to the first end, and a second external thread proximate to the second end. The first external thread twists in a first direction, the second external thread twists in a second direction, and the first direction is different from the second direction. The first external thread includes a minor diameter, the second external thread includes a major diameter, and the minor diameter of the first external thread is greater than the major diameter of the second external thread.

A nut, in particular a union nut for a line connection, extends along a longitudinal direction, wherein the nut has at least one expansion region. The expansion region has circumferentially one or more recesses which extend transversely and/or obliquely to the longitudinal direction.

A nut, in particular a union nut for a line connection, extends along a longitudinal direction, wherein the nut has at least one expansion region. The expansion region has circumferentially one or more recesses which extend transversely and/or obliquely to the longitudinal direction.

A precision adjustment fastener mechanism comprises a base, a platform, and a locking push-pull fastener assembly. The base has a first aperture and the platform has a second aperture. The fastener assembly is disposed within the second aperture. The fastener assembly comprises a clamping fastener having a portion positioned in the first aperture, a sleeve having a third aperture extending along an axis of the sleeve. The clamping fastener is positioned within the third aperture. The sleeve comprises a first portion moveable relative to a second portion along the axis. The first portion and the second portion each comprise outer threads. An axial displacement portion separates the first and second portions and transmits a torque between the first and second portions. The axial displacement portion facilitates movement of the first and second portions to bind threads of the first and second portions with the threads of the platform,

A bolt includes a shank having a first end, a second end, a first external thread proximate to the first end, and a second external thread proximate to the second end. The first external thread twists in a first direction, the second external thread twists in a second direction, and the first direction is different from the second direction. The first external thread includes a minor diameter, the second external thread includes a major diameter, and the minor diameter of the first external thread is greater than the major diameter of the second external thread.

A bolt includes a shank having a first end, a second end, a first external thread proximate to the first end, and a second external thread proximate to the second end. The first external thread twists in a first direction, the second external thread twists in a second direction, and the first direction is different from the second direction. The first external thread includes a minor diameter, the second external thread includes a major diameter, and the minor diameter of the first external thread is greater than the major diameter of the second external thread.

A locking structure includes a main body, a first combining portion, and a second combining portion. The second combining portion is disposed on an outer periphery of the main body. The first combining portion is connected to a bottom portion of the main body. A chamber is formed inside the first combining portion. At least one slot is formed on a side wall or a bottom wall of the first combining portion and communicated with the chamber. The chamber is at least partially filled with the workpiece via the at least one slot, and the workpiece is at least partially combined with an inner side and an outer side of the first combining portion, so as to combine the locking structure with the workpiece tightly.