Arrangements for mounting pool fittings and methods for mounting pool fittings, for example, return fittings, to pool walls are provided. The arrangements and methods facilitate the installation and maintenance of pool fittings by preventing the undesirable rotation of the fitting during installation or maintenance. Aspects of the invention are characterized by mounting plates having one or more projections or recesses that engage one or more projections or recesses on the pool fitting to restrict rotation of the fitting. Mounting plates having one or more restricting projections or recesses are also disclosed. Aspects of the invention are not limited to return fittings, but can be adapted for use with any structure mounted to a pool wall, for example, to an insulated pool wall.

Provided in this disclosure is a self-tightening nut and bolt system. The nut and bolt system can be configured to provide a consistent level of tightness and torque to reliably attach two mechanical components together. The nut comes with a microcontroller, and a motorized thread, where the microcontroller controls the tightness of the nut. The microcontroller allows the nut's tightness to be monitored, and controlled over time. This prevents the nut from becoming loose, and allows certain levels of tightness to be controlled over time.

An installation nut includes a body, an upper cover, at least two threaded blocks, and a transmission member. The upper cover is fixedly connected to the body. An inner wall of each of the at least two threaded blocks includes an internal thread, and an outer wall of each of the at least two threaded blocks includes a first inclined surface and a first straight surface. The transmission member is movably disposed between the body and the upper cover. A top surface of the transmission member includes one or more transmission blocks configured to extend out of the upper cover. A lower end of the transmission member includes at least one second straight surface configured to couple with the first straight surfaces and at least one second inclined surface configured to couple with the first inclined surfaces.

A tolerance-compensating fastening arrangement for fastening a component to a structure includes a male fastener having a fastening bolt having a serrated outer profile; and a female fastener having a socket base arranged therewithin movable along a horizontal plane and having a conical funnel to receive the bolt such that horizontal tolerances between the male and female fasteners are compensable by movement of the socket base actuated through contact of the bolt with an inner surface of the funnel; and a socket jaw arranged on the socket base and having several jaw segments arranged circumferentially around a vertical axis to form a central jaw opening configured to receive the bolt through the funnel, the jaw segments configured movable radially with respect to the vertical axis to adjust a size of the jaw opening to retain the bolt along the vertical axis via contact of the serrated inner and outer profiles.

A segmented nut has inner segments and an outer sleeve. Part of the sleeve interface portion and part of the segment interface portion engage when the sleeve rotates relative to the inner nut during release of the segmented nut with part of the segment interface portion at a greater distance from a central axis of the segmented nut than a minimum distance of the at least part of the sleeve interface portion from the central axis. One or more of the segments can include a retainer preventing the sleeve moving toward a free face of the segment(s). One or more of the segments can have a flange portion providing an increased working (compression) face relative to a plain segmented nut. An assembled segmented nut can include some radial freeplay for the segments to move radially whilst being retained within the sleeve prior to application of the segmented nut to a threaded bolt, stud or rod such that threading of the segmented nut onto the thread of the bolt, stud or rod removes the freeplay.

Disclosed are systems and methods for attaching interior furnishings in a vehicle. In one embodiment, a system can include an anchor having a rivet nut, a bolt for engaging the rivet nut, and a railing that can be fastened to the anchor with the bolt. In certain embodiments, the anchor can include a main plate having a rivet nut, a backer plate having press nuts, and screws suitably configured to engage the press nuts and facilitate a movement of the backer plate towards the main plate. In some embodiments, the anchor is configured to fit into and removably attach to a factory cutout of a wall of the vehicle.

A structural fastener includes a threaded rod coupler. The threaded rod coupler includes a split nut for coupling to the threaded rod.

A split coupler, and methods of making and using such a split coupler, whereby the split coupler includes a first semi-cylindrical member, a second semi-cylindrical member, and an interlocking assembly configured to interlock the first and second semi-cylindrical members to form a substantially cylindrical coupler having a coupler inner surface which defines a throughbore. Additionally, the split coupler can include spiral threads coupled to the coupler inner surface. Furthermore, the split coupler can include a flange inwardly extending from the coupler inner surface.

A tolerance-compensating fastening arrangement for fastening a component to a structure includes a male fastener having a fastening bolt having a serrated outer profile; and a female fastener having a socket base arranged therewithin movable along a horizontal plane and having a conical funnel to receive the bolt such that horizontal tolerances between the male and female fasteners are compensable by movement of the socket base actuated through contact of the bolt with an inner surface of the funnel; and a socket jaw arranged on the socket base and having several jaw segments arranged circumferentially around a vertical axis to form a central jaw opening configured to receive the bolt through the funnel, the jaw segments configured movable radially with respect to the vertical axis to adjust a size of the jaw opening to retain the bolt along the vertical axis via contact of the serrated inner and outer profiles.

A tolerance compensation arrangement for fastening first and second components with compensation of tolerances between the components. The arrangement comprises a base element having a first element with a first inner thread, a second element with a second inner thread, a supporting element arranged in between, and an adjustment unit with a threaded sleeve with an outer thread and a dragging unit at least partially arranged in the sleeve. The outer thread forms a first thread pairing of a first thread direction with the first inner thread. A fastening screw, can be screwed into the second inner thread via a second thread pairing of a second thread direction opposite to the first thread direction. The fastening screw can be connected to the adjustment unit via the dragging unit so that, during the rotation of the fastening screw, the adjustment unit co-rotates and is moved into abutment with the first component.