A bicycle rear wheel sub-assembly having a sprocket-carrying body, a cogset including a plurality of axially adjacent sprockets with at least three of the plurality of sprockets formed into a monolithic set and a ring nut securing the cogset to the sprocket-carrying body. The ring nut is formed as two parts assembled together—an axially outer first part on which a tubular body and a flange are formed, and an axially inner second part on which a threaded portion is formed. This structure provides a simple and effective coupling of the ring nut with the monolithic sub-set of the cogset and the sprocket-carrying body.

A system for establishing an anchorage or augmentation in hard tissue with the aid of a material having thermoplastic properties, which is brought to the site of the anchorage or reinforcement in a solid state, is liquefied in situ, and, in a liquefied state, is displaced to contact the object. The system includes a housing with a proximal housing part and mounted therein, a transmitting piece possibly coupled to an energy source and a driver spring, a distal housing part releasably coupled to the proximal housing part, a permeable sleeve couplable to the distal housing part, and a thermoplastic element positionable in the permeable sleeve. The two housing parts, the transmitting piece, the driver spring and the permeable sleeve form a closed load frame in which the thermoplastic element is compressed between the transmitting piece and the permeable sleeve.

A joint device for screw and nut includes a first body and a second body. The first body is provided with a plurality of first internal threads, of first external threads, and a first protrusion. The first protrusion is extended with a first engaging portion. The second body is provided with a plurality of second internal threads, of second external threads, and a second protrusion. The second protrusion is extended with a second engaging portion, such that the first protrusion and the second protrusion can be engaged with each other. When in a joining status, the first engaging portion and the second engaging portion are engaged with each other, such that the first body and the second body are folded up and around the screw. The nut can therefore screw up the first body and the second body correspondingly.

Disclosed is a bilateral anti-loosening and sealing nut, comprising a nut body having a tapped hole with a tapped-hole thread and being surrounded by a central-wall-surrounding portion, a flange portion, a front-protruding-annular edge, a rear-recess portion, and a front-engaging portion, the front-engaging portion having an inwardly-recessed-receiving portion and an engaging-protruding edge, the inwardly-recessed-receiving portion being formed between a front surface of the central-wall-surrounding portion and a rear surface of the engaging-protruding edge; an annular washer being arranged within the inwardly-recessed-receiving portion; and a sealing washer being arranged within the rear-recess portion.

A multi sectioned nut is operable to attach to a threaded fastener. The multi sectioned nut includes a plurality of multi sectioned threaded nut sections and a turn-lock formed on at least one end of the plurality of threaded nut sections. A cage is detachably coupled to the plurality of nut sections operable to spring open on a side opposite the cage to allow the threaded fastener to pass through. The turn-lock is inserted into a strut slot and rotated to removably attach to the strut slot. According to one embodiment, the multi sectioned nut may include at least two sections.

A split nut with an outer body and an inner body formed of two jaws for gripping a threaded rod. The outer body has an inner surface defining tapered axial channel and includes a separator between the jaws to guide the jaws against an inner surface of the tapered axial channel. The inner surface can be circular in cross section and the outer body can also have an outer surface be circular in cross section. A lock is arranged to lock the jaws in an axial position at which the jaws are sufficiently close to force the jaws into threaded engagement with the threaded rod. The lock can also lock the jaws in an additional axial position at which the threaded rod can be moved freely axially between the jaws. The lock can comprise a locking pin movable within the outer body into respective slots corresponding to each locking position.

This invention is a fastener. The fastener has a body, a damper and a restraint. The body is provided with a coupling part, which comprises a discontinuous raised rib going around an outer surface of the coupling part; the damper is fitted over the coupling part; a recess going around an inner surface of the damper; the raised rib is fitted to the recess; the restraint is arranged to surround the damper, so the restraint is capable of restricting the damper in a certain position range of the body.

A spin nut is operable to attach to a threaded fastener such as a rod. The spin nut includes a threaded nut having a shoulder for supporting a bracket, and a snap retainer detachably coupled to the threaded nut operable to spin onto any position on the threaded rod. At least one wing is formed on the snap retainer operable to attach to a bracket having a hole and spin to adjust to a position on the threaded rod. The snap retainer is detachably couple the plurality of sectioned threaded nut sections operable to spring open on a side opposite the band to allow the threaded rod to pass through.

A split nut arrangement is provided. The split nut arrangement may be coupled to a fluid line. The split nut arrangement may comprise a first nut half and a second nut half. The first nut half and the second nut half may each comprise one or more mating grooves. The mating grooves of the first nut half may be configured to interlock with the mating grooves of the second nut half to couple the first nut half to the second nut half.

A split nut can include a first nut portion and a second nut portion. The first nut portion can define a first receptacle and a second receptacle. The second nut portion can define a first passage and a second passage, and the first and second passages can be respectively located to align with the first and second receptacles. A first pin and a second pin can respectively extend through the first and second passages to respectively engage with the first and second receptacles, for instance to secure the first and second nut portions together to close the split nut and thereby define a nut passage.