A fastening system including a fastener and a fastener installation tool. The fastener includes a pin member having an elongated shank portion with a threaded portion, a stop shoulder located at an end of the threaded portion, and a pull portion extending from the stop shoulder. The stop shoulder includes an outer rim and an inner annular wall. The inner annular wall and the inner face form an annular recess. The fastener installation tool includes a puller having a front face. The recess of the fastener is adapted to receive the front face of the fastener installation tool when the puller engages the pull portion of the pin member and facilitates alignment of teeth of the installation tool and pull grooves of the pin member.

A construction support structure contains: a plurality of first hollow posts, plural second hollow posts, and at least one platform. Each first hollow post includes at least one groove, and each groove has a first width section and a first narrow section, wherein a horizontal width of the first width section is more than the first narrow section. Each second hollow post includes two locking protrusions, and a distance between two sides of each locking protrusion is more than a distance between a top end and a bottom end of each locking protrusion, wherein each locking protrusion has a connecting section, a diameter of which is less than the distance between the two sides of each locking protrusion and the distance between the top end and the bottom end of each locking protrusion, and the connecting section corresponds to the first narrow section of each first hollow post.

A setting tool for a blind rivet, the setting tool including a shell as well as a drive unit, a pull unit, a clamping unit, and a nose part which are contained in the shell, wherein the clamping unit includes a plurality of clamping blocks angularly arrayed around a pulling direction in sequence; a plurality of clamping teeth are provided on an inner side, facing a mandrel of a blind rivet, of each clamping block; the clamping teeth at a front section of the clamping block are at least partially removed in advance to reduce or eliminate a concentrated stress or shear force acting on the front sections of the clamping blocks and generated due to unequal acting forces from the clamping sleeve and the blind rivet, wherein the unequal acting forces are caused by actual processing tolerance, design, or the fact that the mandrel of the blind rivet cannot be totally parallel to the axis R constantly during riveting.

A riveting device has a riveting tool actuated by a drive. A mandrel holder can be moved relative to a mouthpiece along an operative axis. A spring element exerts a force into the mandrel holder. The drive has a threaded spindle with a front end facing towards the mandrel holder and an opposing back end. The spindle has a through hole which extends in the direction of its longitudinal extension. A back longitudinal section extends up to the back end of the threaded spindle. A front longitudinal section present before the back longitudinal section. A fixing structure created by a material recess non-displaceably connects the threaded spindle to the mandrel holder. The front longitudinal section of the through hole has a cross-sectional surface area which is smaller than the cross-sectional surface area of the back longitudinal section. The spring element is arranged in the back longitudinal section.

A blind rivet fastening device including a dual function clutch device. The clutch releases at the rear end position RP of the pulling head and the clutch slips at the home position HP. The device includes a spindle clutch axially movable with respect to the spindle and integrally rotated, and a nut clutch integrally formed with the ball screw nut. The spindle clutch can move in the axial direction and can release from the nut clutch. The spindle clutch also has a first segment portion; one end of the first segment portion is a vertical plane and the other end is a slanted plane. The nut clutch has second segment portions of complementary shape. When the pulling head reaches the rear end position RP, the clutch is disengaged. When the pulling head returns to the home position HP, the inclined faces of the clutch slip with each other.

A blind fastener for connecting workpieces includes a bolt and nut. The bolt includes a shaft, bolt head, and lug. The bolt head is between the shaft and lug and extends radially outward from the shaft. The shaft defines external threads opposite the bolt head. The lug includes a first tool engagement portion and a first frangible portion that frangibly couples the lug to the bolt head. The nut includes a sleeve, nut head, and handling member. The shaft is threadably received in the sleeve. The nut head extends radially outward from the sleeve and defines a recess that receives the bolt head. The handling member surrounds at least a portion of the lug. The handling member includes a second frangible portion and a second tool engagement portion. The second frangible portion frangibly couples the second tool engagement portion to the nut head.

A jaw assembly for a rivet setting tool the jaw assembly including a plurality of jaws each jaw defining part of an interlocking mechanism and an oppositely located part of another interlocking mechanism wherein adjacent jaws interlock via engagement of the parts of the interlocking mechanisms of the respective jaws for enabling radial movement of the jaws relative to each other while restricting axial movement of the jaws relative to each other.

A riveting device has a riveting tool actuated by a drive. A mandrel holder can be moved relative to a mouthpiece along an operative axis. A spring element exerts a force into the mandrel holder. The drive has a threaded spindle with a front end facing towards the mandrel holder and an opposing back end. The spindle has a through hole which extends in the direction of its longitudinal extension. A back longitudinal section extends up to the back end of the threaded spindle. A front longitudinal section present before the back longitudinal section. A fixing structure created by a material recess non-displaceably connects the threaded spindle to the mandrel holder. The front longitudinal section of the through hole has a cross-sectional surface area which is smaller than the cross-sectional surface area of the back longitudinal section. The spring element is arranged in the back longitudinal section.

A riveting device has a device housing, a riveting tool and a drive for actuating the riveting tool. The riveting tool has a mouthpiece and a mandrel holder that can be moved relative to the mouthpiece along an operative axis. The drive has a spindle gear with a threaded spindle, and a spindle nut operatively connected thereto. The threaded spindle is operatively connected to the mandrel holder for movement along the operative axis. A support structure provides axial support of the spindle nut. A tool housing is axially supported on the mouthpiece and axially supported on the support structure via a flange. The mandrel holder is received axially moveably in the tool housing. A supporting structure supports the tool housing. The tool housing is held on the supporting structure by a retaining structure. The retaining structure and the supporting structure are connected to each other via a bayonet lock.

A riveting device has a riveting tool and a drive device for actuating the riveting tool. A mandrel holder can be moved relative to the mouthpiece along an operative axis. The drive device has a drive element which is set up to be moved along the operative axis in order to drive the mandrel holder. The drive element is connected directly or indirectly via a screw connection to the mandrel holder and the screw connection is formed by rotating the mandrel holder and the drive element relative to each other around a rotational axis. A locking element is in a locking position in which the mandrel holder is mechanically blocked against rotation around the rotational axis relative to the drive element in a rotational position. The locking element is brought into the locking position by a movement performed radially relative to the rotational axis.