A fastener which includes a first portion of a shaft which defines threads, and a second portion of the shaft, which extends from the first portion of the shaft, includes a planar curved surface. A method for securing a fastener to an e-nut, which includes the step of inserting the fastener positioned within an e-nut into an opening defined by and which extends through at least two components to be secured together, wherein: a first portion of the shaft of the fastener defines threads; and a second portion of the shaft of the fastener, which extends from the first portion of the shaft, defines a curved planar surface.

A panel fastener is provided that has a head having a first surface and a second surface opposite the first surface; an engagement feature on the first surface of the head, the engagement feature being configured to be engaged by a driving tool; a shank extending from the second surface of the head; a threaded portion extending from the shank, the threaded portion having first and second helical threads arranged in an intertwined manner; the first thread extending farther radially from the central axis than does the second thread; and the shank being located between the head and the threaded portion.

A captive fastener is disclosed having a longitudinal slot along the shank for receiving a hold-out clip, and a chamber that houses a retractable cam member. The cam member is spring actuated to extend out of the shank and can be retracted into the cavity against the bias of the spring to pass through a primary panel and subpanel. The cam member is shaped to counter-rotate in the presence of a traverse force, such as the panel bearing against it.

A facade panel screw for the optimized fastening of facade panel elements to a substructure has a head having a very large diameter, a subsequent, essentially cylindrical shaft section (22) extending along a central longitudinal axis (A) and a subsequent tip region (23). The shaft section (22) includes, as viewed from the head, a threadless underhead section (24), a stop collar (25) and a threaded section (28). The thread in a first part (26) of the threaded section (28) subsequent to the stop collar (25) has an outer diameter D.sub.r, which is attenuated compared to the thread in a second part (27) with outer diameter D.sub.n, over several convolutions, so that D.sub.r<D.sub.n. This threaded section 26 allows a controlled overwinding of the facade panel screw in use. A corresponding fastening arrangement includes a facade panel, a substructure for transferring the load to a building surface and the facade panel screw.

A positioning and fastening system for combining planks comprises at least two planks, each of which has a junction surface at one end plane and a clamping surface at the other end plane wherein the junction surface on each of the planks is designed to have a positioning counterbored hole, the clamping surface is designed to have a pre-burying counterbored hole opposite to the positioning counterbored hole, and both the positioning counterbored hole and the pre-burying counterbored hole allow a bolt hole to penetrate in between. For combining the two planks based on the opposite junction surfaces, the two positioning counterbored holes allow a positioning pin to be plugged in and between for positioning, the positioning pin develops a bolt passage centrally, the nut hole inside each positioning counterbored hole of the two planks pre-buried a nut in which a screw hole is prepared centrally, and a junction bolt penetrates from one nut at anyone of the two planks through the bolt passage and is fixed in the screw hole of the nut at the other plank. Based on above components, combining two planks is completed fastly and accurately.

A fastening device for fastening at least two panels or flanges to each other is disclosed. The device comprises a male member, a female member and a washer. The male member is inserted into and at least partially through aligned slots in the panels or flanges. The male member includes or houses a first securing component. The female member defines an opening generally complementally shaped to the projection of the male member. The male member and the female member are configured to receive the at least two panels or flanges between them when the projection is received in the opening. The washer mates with the female member such that displacement of the washer relative to the female member towards the male member is substantially prevented. The device further comprises a second securing component configured to mate with the first securing component and to secure the washer against the female member.

Captive fastener systems and structural assemblies having captive fastener systems are described. The captive fastener systems include a captive fastener assembly having a sleeve and a captive fastener arranged within the sleeve, a mounting assembly having a bushing and a mounting fastener arranged to pass through the bushing, and a joining body having a mounting aperture, wherein the sleeve is attached to the joining body and the bushing and the mounting fastener are configured to pass through the mounting aperture. The mounting assembly is configured to provide a first degree of movement of the captive fastener system and the captive fastener assembly is configured to provide a second degree of movement of the captive fastener system.

The present disclosure provides an insert of a fastening system. The insert includes (a) a flange, (b) a sidewall extending from the flange and defining a first through-hole, (c) a nut including a first end and a second end and defining a second through-hole, wherein the second end of the nut comprises two or more gripping fingers extending longitudinally from the first end of the nut and separated by two or more slots, and wherein the two or more gripping fingers are flexible in a radial direction and biased to converge inward such that the second through-hole is tapered from the first end of the nut to the second end of the nut, and (d) a stopper coupled to an interior surface of the sidewall and positioned between the first end of the nut and the flange.

A joint member (1) for mechanically connecting a first panel (51) and a second panel (52) to each other has a body (20) equipped with at least four connecting portions (21, 22, 23, 24) each having a respective seat (31, 32, 33, 34) which receives a fixing element (5). The seats (31, 32, 33, 34) are spaced from each other and, in a plan view of the joint member (1), are positioned at the vertices of a quadrilateral. A first (21) and a second (22) of said connecting portions form a first pair of connecting portions, to be fixed to the first panel (51), whereas a third (23) and a fourth (24) of said connecting portions form a second pair of connecting portions, to be fixed to the second panel (52). Each connecting portion (21, 22, 23, 24) has a first face (41), which is facing the respective panel (51, 52) in use, and a second face (42), which is on an opposite side to the first face (41). Each seat (31, 32, 33, 34) is, or comprises, a through hole which extends between the first face (41) and the second face (42). The second face (42) of the first connecting portion (21) and the second face (42) of the third connecting portion (23) are on a same first side (25) of the body (20); the second face (42) of the second connecting portion (22) and the second face (42) of the fourth connecting portion (24) are on a same second side (26) of the body (20), opposite to the first side (25). An assembly (57) comprises a first panel (51), a second panel (52), at least one joint member (1) and a plurality of fixing elements (5). A wall (58) for a building or a floor for a building is formed by a plurality of panels (51, 52, 53) and comprises at least said assembly (57).

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.