Fastening devices are described. In one example, the fastening devices can be used for a landing string buoyancy solution. The landing string hardware includes a stop collar to be fitted and secured around a drill pipe and stop collar hardware to secure the stop collar together around the drill pipe. The stop collar can be secured at one end of a number of buoyancy modules placed along a longitudinal length of the drill pipe to hold them into place along the drill pipe. The stop collar can be formed from long fiber thermoplastic using extrusion-compression molding. The stop collar hardware includes a bolt having an external thread formed from long fiber thermoplastic and a nut having an internal thread formed from long fiber thermoplastic. Both the stop collar and the stop collar hardware are tested for suitability for the application of holding the buoyancy modules in place under operating conditions.

A friction welding method for fastening a connection bushing, such as a threaded bushing for example, in a housing. In order to improve the quality of the connection, the connection bushing is attached to the housing using a friction welding element. The friction welding element consists of the connection bushing, on which a friction welding shell with a radially outer friction welding contour is formed or molded. Connecting and sealing portions are produced between the friction welding element and the housing during the friction welding process by means of a special design of the friction welding contour.

A friction welding method for fastening a connection bushing, such as a threaded bushing for example, in a housing. In order to improve the quality of the connection, the connection bushing is attached to the housing using a friction welding element. The friction welding element consists of the connection bushing, on which a friction welding shell with a radially outer friction welding contour is formed or molded. Connecting and sealing portions are produced between the friction welding element and the housing during the friction welding process by means of a special design of the friction welding contour.

Examples relate to a wing-nut (114) for a tolerance compensating fastener (100) cooperable with a threaded fastening element (116). The wing-nut (114) having a rigid insert (306) and a body component (300). The rigid insert (306) formed as a hollow cylindrical body and comprising a plurality of retention elements (308) and a plurality of threads (302) formed on an inner wall of the hollow cylindrical body. The body component (300) surrounding the rigid insert (306), the body component (300) having an opening, coaxial with a central longitudinal axis of the rigid insert (306), to create a through-hole with the hollow cylindrical body to receive the threaded fastening element (116). Each of the plurality of retention elements (308) is encapsulated by the body component (300) to be interlocked and fixed in the body component (300).

A fastener is provided. In another aspect, a fastener is made of layers of material, a light curable material and/or multiple built-up materials. Another aspect uses a three-dimensional printing machine to emit material from an ink jet printing head to build up a fastener.

A fastener is provided. In another aspect, a fastener is made of layers of material, a light curable material and/or multiple built-up materials. Another aspect uses a three-dimensional printing machine to emit material from an ink jet printing head to build up a fastener.

A fastener is provided. In another aspect, a fastener is made of layers of material, a light curable material and/or multiple built-up materials. Another aspect uses a three-dimensional printing machine to emit material from an ink jet printing head to build up a fastener.

Blind inserts for use with sandwich panels and methods for manufacturing the same. A blind insert can include a nut arranged in an insert. The insert can include a cavity at an end of the nut. When a screw is screwed into the nut, the screw can enter the cavity and dig into the insert. The interference between the insert and the screw can provide friction that prevents the screw from loosening in a vibrating environment. The blind insert can be made by placing a mandrel into the nut. The mandrel includes a nose that extends past the end of the nut. When the insert is molded around the nut, the mandrel prevents mold material from entering a threaded aperture of the nut and forms the cavity in the insert. The blind insert can also be made by placing a cap that defines the cavity on the end of the nut. The insert can be molded around the cap and the nut.

A three-dimensional data generation method of a threaded fastener for three-dimensional additive manufacturing includes: a step of generating first threaded portion data by enlarging three-dimensional data of a threaded portion of a standard threaded fastener along the axial direction of the threaded portion by a factor of 1.0 to 2.5; a step of generating second threaded portion data by duplicating the first threaded portion data; a step of generating third threaded portion data by disposing the first threaded portion data and the second threaded portion data on the same axis such that one ridge in the second threaded portion data is located between two ridges in the first threaded portion data; and a step of generating fourth threaded portion data by extracting a portion with a length from a part in which the first threaded portion data and the second threaded portion data overlap in the third threaded portion data.