A non-slip reinforcing bar coupler includes a coupler body, a stopper, and a thread formed on outer surfaces thereof, a cap having an insertion hole, a cap body having a thread for screw-coupling with the coupler body, and an inclined surface formed on an inner surface of the insertion hole thereof, a locker having pressing pieces that have a cross section of an arc shape, a spike protruding from an inner surface of the pressing piece, and an outer inclined surface formed on a front outer surface of the pressing piece at the same inclination as the inclined surface of the cap, the rear side of the locker being inserted into the cap, and a support member located between the coupler body and the locker, deformed when the cap is tightened, and allowing the locker to be displaced to the coupler body by a certain displacement.

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 quick connect nut contains: a body including a first locking part, a second locking part, and a flexible C-shaped retainer. The first locking part includes a first forcing face, a first tilted face, a first peripheral groove, a first semicircular orifice having first inner threads, at least one first protrusion, and at least one first arcuate notch. The second locking part includes a second forcing face, a second tilted face, a second peripheral groove, a second semicircular orifice having second inner threads, at least one second protrusion, at least one second arcuate notch, and a second through hole. When the first and second locking parts lock together, an angle is defined between the first and second tilted faces so that a width of an expanding opening between the first and second locking parts is more than an outer diameter of the threaded rod.

A nut for a musical instrument includes: a clamp jaw having an opening through which a stand is passable, the clamp jaw being configured to, in a state of the stand being disposed in the opening, change a size of the opening by changing a position of the clamp jaw between an open position and a closed position; an elastic member configured to, in a state of the clamp jaw being in the closed position, clamp the clamp jaw to the stand by exerting a force directly on the clamp jaw; an operating element having a pressing portion and a front end portion; and a housing accommodating the clamp jaw, the elastic member, and the operating element.

A quick connect nut contains: a body including a first locking part, a second locking part, and a flexible C-shaped retainer. The first locking part includes a first forcing face, a first tilted face, a first peripheral groove, a first semicircular orifice having first inner threads, at least one first protrusion, and at least one first arcuate notch. The second locking part includes a second forcing face, a second tilted face, a second peripheral groove, a second semicircular orifice having second inner threads, at least one second protrusion, at least one second arcuate notch, and a second through hole. When the first and second locking parts lock together, an angle is defined between the first and second tilted faces so that a width of an expanding opening between the first and second locking parts is more than an outer diameter of the threaded rod.

A connector is disclosed for interconnecting a baluster having a recess on at least one end thereof to a railing component. The connector has a first body portion having an outer surface and an interface surface with a mounting groove thereon. The connector also has a second body portion having an outer surface and an interface surface with a mounting groove thereon. The interface surface of the second body portion having a mating portion adapted to receive a portion of the interface surface on the first body portion, and a hinge connecting the first body portion to the second body portion.

Nut devices including a butterfly portion with an axial hole that can be opened such that the nut device can be slid up or down a host device, such as a cymbal stand rod, without the typical screw-type motion, are disclosed. Also disclosed are nut devices including drum key functionality.

A thread fixing base and a quick fixing structure, wherein the thread fixing base is used in conjunction with a thread rod. The thread fixing base comprises a base and a top cover, wherein the base has a thread groove, and is provided with a hinge base on one side thereof, and is provided with a buckle groove on the other side thereof. The top cover has a limit top plate that is pressed against the thread ring surface of the thread rod and extends axially along the thread ring surface. On one side of the limit top plate, the top cover is provided with a shaft component that is hinged and matched with the hinge base. On the other side of the limit top plate, the base is provided with a buckle plate that is locked with the buckle groove.

A fast-dismounted cymbal-locking nut being screwed through an outer thread of a mounting bolt of a cymbal to press the cymbal tightly and adjust the position of the cymbal, comprises a seat, a first wing, a second wing, and a resilience element. The first and second wings are pivotally coupled to the seat; each of them has a locking position and a fast-dismount position. The first and second wings respectively include first and second semi-spherical threaded grooves, which jointly form an inner thread corresponding to the outer thread at their locking positions. At the fast-dismount positions, the shortest distance between the first and second semi-spherical threaded grooves is larger than the outer diameter of the outer thread. The user can directly mount the nut to the outer thread without screwing the nut through the outer thread. The nut enables the user to fast mount or dismount a cymbal.

A fast-dismounted cymbal-locking nut being screwed through an outer thread of a mounting bolt of a cymbal to press the cymbal tightly and adjust the position of the cymbal, comprises a seat, a first wing, a second wing, and a resilience element. The first and second wings are pivotally coupled to the seat; each of them has a locking position and a fast-dismount position. The first and second wings respectively include first and second semi-spherical threaded grooves, which jointly form an inner thread corresponding to the outer thread at their locking positions. At the fast-dismount positions, the shortest distance between the first and second semi-spherical threaded grooves is larger than the outer diameter of the outer thread. The user can directly mount the nut to the outer thread without screwing the nut through the outer thread. The nut enables the user to fast mount or dismount a cymbal.