A blind rivet element for fastening to a workpiece which has a hole, which is in particular preshaped, comprises a sleeve body and a bolt element led through the sleeve body, wherein the blind rivet element can be introduced into the hole of the workpiece and the sleeve body can be sectionally deformed by an axial movement of the bolt element relative to the sleeve body to fasten the blind rivet element to the workpiece. The sleeve body has at least one contact section which is arranged and configured such that the contact section cuts into a wall of the hole and/or into a region around the hole and/or effects a deformation of the wall of the hole and/or of the region around the hole, in particular to establish an electrical contract between the workpiece and the blind rivet element.

A blind rivet arrangement (1) is described, comprising multiple rivet bodies (3, 3a, 3b) arranged in succession on a mandrel (2), the mandrel (2) having a mandrel head (8) with an outside diameter which is greater than an inside diameter of the rivet bodies (3, 3a, 3b). The aim is to provide an inexpensive way to produce a blind rivet arrangement that works effectively. To this end the mandrel (2) and the mandrel head (8) are designed as parts that are produced separately and joined together.

Blind fasteners and methods of fastening are provided. A blind fastener comprises a sleeve and a mandrel. The sleeve is adapted for installation into a threaded bore in a structure. The sleeve comprises a head portion configured to receive a torque, a first sleeve end, a second sleeve end, an elongate portion extending intermediate the first sleeve end and the second sleeve end, and a cavity extending from the first sleeve end to the second sleeve end. The mandrel is at least partially disposed through the cavity of the sleeve. The mandrel comprises a first mandrel end disposed adjacent to the first sleeve end. The first mandrel end comprises an enlarged portion having a diameter greater than a diameter of the cavity. The elongate portion is configured to at least partially deform into threads of the threaded bore responsive to forcible contact between the enlarged portion and the sleeve.

Aerodynamic structures and methods of forming aerodynamic structures are disclosed herein. The aerodynamic structures include a first skin region that includes a first skin edge and a second skin region that includes a second skin edge. The first skin region and the second skin region are angled relative to one another and define a gap between the first skin edge and the second skin edge. The aerodynamic structures also include a trailing edge structure that extends within the gap and between the first skin edge and the second skin edge. The aerodynamic structures further include a plurality of blind fasteners. A first subset of the plurality of blind fasteners operatively interconnects the first skin region and the trailing edge structure. A second subset of the plurality of blind fasteners operatively interconnects the second skin region and the trailing edge structure. The methods include methods of forming the aerodynamic structures.

A printed circuit board assembly (PCBA) waveguide assembly comprises a PCBA, a waveguide, and a spring-loaded rivet. The spring-loaded rivet comprises a rivet head, a rivet shank, a rivet tail, and a spring element and fastens the PBCA to the waveguide. The spring element provides flexibility in the clamping force of the rivet to accommodate thermal expansion and contraction, creeping and shear forces experienced by the PCBA and waveguide.

A claw-type rivet-pulling tool comprises a tool base, a claw portion disposed at an end of the tool base, and a middle hole extending from the claw portion into the tool base. The claw portion comprises multiple clamping pieces, being expanded or contracted when operated. Each of the multiple clamping pieces has a backwardly-pulling clamping portion disposed at a tail end of said clamping piece and facing the middle hole. The claw-type rivet-pulling tool clamps a mandrel of a rivet assembly through the backwardly-pulling clamping portion of each of the multiple clamping pieces to pull it. The backwardly-pulling clamping portion clamps a backwardly-inclined cone of the mandrel, thus having a larger gripping area. Therefore, the mandrel is more stably clamped, contributing to the claw-type rivet-pulling tool pulling the mandrel and a pulling sleeve applying force to a rivet head of a rivet body of the rivet assembly for deformation.