A mechanical connector, including a telescopically assembled, Merlin™ Family Connector is provided with one or more sets of threads on substantially matching frustoconical surfaces of a pin and a box of the connector. Strengthening means are introduced involving at least one of: a mechanical stiffening arrangement on an outside surface of the box or a mechanical stiffening arrangement on an inside surface of the pin. The strengthening means provided may involve systems of arbitrarily oriented ribs and/or fairing surfaces. The mechanical stiffening arrangements may be integral with the box or the pin, or they can be separate external/internal strengthening arrangements, as applicable. They can be also essentially annular clamps that would have relatively regular shapes essentially conforming to the external or internal surfaces of the box or the pin, respectively. The above modifications can be introduced to traditional connectors and to connectors designed to transfer high torsional loads.

A nut adapted to be connected with a bolt includes a through hole defining a first central axis. A first internal thread is formed on an inner peripheral surface of the through hole at a first side of a first end of the through hole. A second internal thread is formed on an inner peripheral surface of the through hole at a second side, opposite to the first side, of a second end of the through hole. The first internal thread and the second internal thread define a second central axis, distinct from the first central axis. The bolt is capable of being positioned in the through hole in a first posture in which the bolt is parallel to the first central axis, and in a second posture in which the bolt is parallel to the second central axis and engaged with the first and second internal threads.

A nut adapted to be connected with a bolt includes a through hole defining a first central axis. A first internal thread is formed on an inner peripheral surface of the through hole at a first side of a first end of the through hole. A second internal thread is formed on an inner peripheral surface of the through hole at a second side, opposite to the first side, of a second end of the through hole. The first internal thread and the second internal thread define a second central axis, distinct from the first central axis. The bolt is capable of being positioned in the through hole in a first posture in which the bolt is parallel to the first central axis, and in a second posture in which the bolt is parallel to the second central axis and engaged with the first and second internal threads.

The present invention relates to a press-fit nut for an assembly, a press-fit nut-bolt assembly, and a method of constructing a steel-concrete composite structure using same, wherein a process is simple and a base material does not become deformed during an installation process. The press-fit nut-bolt assembly of the present invention includes a press-fit nut, a stud bolt, a counter nut, and a washer. The press-fit nut includes: a head part formed in a typical nut shape; and a press-fitting part that is formed extending from one of the two surfaces of the head part so as to have an outer diameter less than that of the head part, and that is inserted, through press-fitting, into a base material (M) that is an object requiring fastening. A hollow having threads is continuously formed in the head part and the press-fitting part. The stud bolt includes a body part that is coupled to the press-fit nut by passing therethrough, and a pin tail which is formed extending from an end of the body part and to which a mechanism for rotating the body part is coupled. The body part includes a first threaded portion and a second threaded portion which are formed on the outer surface of the body part along the lengthwise direction of the body part and spaced apart from each other.

An assembly comprising first and second structural elements having aligned holes, a fastener that occupies at least respective portions of the holes without a surrounding sleeve, and a mating part that is coupled to the fastener. The fastener comprises: a head; a circular cylindrical shank extending from the head; a mating portion comprising external projections; and a transition portion disposed between the shank and the mating portion. The transition portion comprises a tapered lead-in section that meets the shank at a shank/lead-in intersection and a radiused lead-in section that meets the tapered lead-in section. The tapered lead-in section tapers gradually in a first axial direction toward the mating portion and has a first profile that is linear and a taper angle equal to or less than 20 degrees, while the radiused lead-in section curves abruptly in the first axial direction and has a second profile that is a circular arc having a radius.

An assembly comprising first and second structural elements having aligned holes, a fastener that occupies at least respective portions of the holes without a surrounding sleeve, and a mating part that is coupled to the fastener. The fastener comprises: a head; a circular cylindrical shank extending from the head; a mating portion comprising external projections; and a transition portion disposed between the shank and the mating portion. The transition portion comprises a tapered lead-in section that meets the shank at a shank/lead-in intersection and a radiused lead-in section that meets the tapered lead-in section. The tapered lead-in section tapers gradually in a first axial direction toward the mating portion and has a first profile that is linear and a taper angle equal to or less than 20 degrees, while the radiused lead-in section curves abruptly in the first axial direction and has a second profile that is a circular arc having a radius.

A fastener includes: a shaft having longitudinal axis and a first and second threaded portions, the first and second threaded portions separated by a central portion having a reduced diameter between the first and second threaded portions, and at least one of the first or second threaded portions is chamfered to reduce friction on leading threads.

A fastener includes: a shaft having longitudinal axis and a first and second threaded portions, the first and second threaded portions separated by a central portion having a reduced diameter between the first and second threaded portions, and at least one of the first or second threaded portions is chamfered to reduce friction on leading threads.

The present invention relates to a multi-purpose connector, and a bracket that can be fitted into the slots of a gondola, including gondolas used to store and display goods in a retail environment.

A threaded connector system including a male threaded connector and a female part, where at least one of the outer surface of the male threaded connector and the inner surface of the female part includes at least one Z layer structure, including a Z seat, Z ridge, Z rib, Z tooth, Z snap lock, Z stack and Z channel.