An anchor bolt fastener assembly with specialized connection capabilities and features for attaching building components to concrete slabs, walls, ceilings, and/or structural surfaces. Compression force can be established and maintained over time using a compression washer in combination with a specialized fastener stud that is designed to exploit the compression washer benefits. Methods of using exemplary embodiments include installing the anchor bolt fastener assembly relatively flush with the surface of the concrete slurry by direct insertion in the slurry using a specialized threaded anchor bolt float. Once the slurry hardens, the anchor bolt and anchor bolt float embedded in the concrete slurry cooperate with the specialized fastener stud to secure the building component to the concrete.

A threaded fastener system, incorporating a bolt and a nut assembly, wherein the bolt has a threaded lead entry point whose pitch and helix angle are of a higher magnitude than that of those on the body/shank of the bolt.

A bolted attachment having opposite threaded sections between which a shank is provided having at least two shank sections with different diameter located at a length from the threaded section of at least three times the difference between a diameter of a threaded section and a minimum diameter of the shank. At least one conical transition is formed between two adjacent shank sections where the ratio of its length to a difference between a diameter at one end of the transition and a diameter at the opposite end of the transition is of at least 0.85.

A screw, in particular for housings, has an elongated section provided at least in parts with a thread, and a screw head. A cone-shape section may be arranged between the screw head and the elongated section, wherein the point of the conical section connects to one end of the elongated section, and the underside of the screw head may be arranged opposite the base surface of the conical section, and a groove for accommodating a seal may be provided between the underside of the screw head and the base surface of the conical section.

An assembly including horological movement support, a motor plate of a timepiece and a fastener fastening the support to the plate. The fastener includes a self-tapping screw having a body that passes through a hole in the support. A recess in the plate or support is tapped when the screw is screwed into the recess. The shape of the recess has a variable width, which is wider at the opening extending to a smaller diameter at the bottom of the recess, the shape corresponding to that of the body of the screw.

The present disclosure relates to non-cylindrical fastening systems and related methods, such as methods of installing a non-cylindrical fastening system. Presently disclosed non-cylindrical fastening systems may include a first fastening component and a second fastening component, where the second fastening component includes an elongate shank configured to be inserted through a hole in the first fastening component and through a hole in a structure to which the first fastening component is being secured. The holes in the first fastening component and the structure may be non-circular, and the elongate shank may be non-circular in perpendicular cross-section. Disclosed fastening systems may also include a third fastening component configured to be installed onto the elongate shank, and substantially prevent axial movement of the elongate shank with respect to the structure and/or first fastening component. Such fastening systems may lower the number of parts required in manufacturing an apparatus, such as an aircraft.

An attachment device includes a flange, an upper shaft, and a lower shaft. The flange defines an upper surface and lower surface. The upper shaft projects from the upper surface and is centered about an upper longitudinal axis. The lower shaft projects from the lower surface and is centered about a lower longitudinal axis. The upper longitudinal axis is not collinear with the lower longitudinal axis. So configured, the attachment device allows two objects to be attached to each other with a lateral offset equal to the lateral offset between the upper shaft and the lower shaft.

An anchor having a sleeve, a bolt which passes through the sleeve and at least one expansion element that is positioned in front of the sleeve and that is axially supported on the sleeve, whereby the bolt has an expansion area for the expansion element, is provided. According to the invention, it is provided for the sleeve to have a wavy shape with axial wave peaks in which the outer radius of the sleeve as well as the inner radius of the sleeve each have a maximum, and with wave valleys in which the outer radius of the sleeve as well as the inner radius of the sleeve each have a minimum.

A bolt and a method for manufacturing the bolt are provided. The bolt includes a screw cap and a bolt bar, the bolt bar includes a positioning bar, a flexible bar and a threaded portion, the positioning bar is connected to one end of the screw cap, and the flexible bar is connected to the positioning bar and the threaded portion respectively. Wherein, an anti-shearing stand is formed on the flexible bar. The threaded portion includes standard threads and transition threads, the transition threads are formed between the flexible bar and the standard threads, and a thread height of the transition threads is smaller than a thread height of the standard threads, wherein the thread height of the standard threads keeps constant. The force distribution of the threads can be optimized, and the threads can effectively cooperate with the threads of the nut.

Disclosed is a fastener that includes a thread having a groove formed therein to provide a loosening resistance due to a deformation of the thread, the deformation resulting from a threshold axial force applied to the thread by a receiving structure.