A blind rivet-nut having an annular-flange-like setting head and a hollow shaft for securing a blind rivet-nut in an opening of a carrier. The hollow shaft has a free end having a threaded portion for receiving a threaded element of a tensioning tool. A clamping portion adjacent to the setting head forms a bead-like deformation when the tensioning tool is used to clamp the carrier between the bead-like deformation and the setting head. A threadless shaft portion is formed between the clamping portion and the threaded portion. The threadless shaft portion is threaded by a thread self-rolling or thread self-tapping fastener. The fastener is received in a positive-locking manner when the fastener is screwed into the thread formed on the previously threadless shaft portion. A method is also disclosed for securing a component to a carrier by a blind rivet-nut.

The present invention relates to a blind rivet nut allowing an easy automated setting comprising a head forming a flange, a shank comprising a head end, a foot end and a cylindrical bore extending along a longitudinal axis (X) from the head end to the foot end, the bore having a first bore segment near the foot end and a second bore segment near the head end, the wall surrounding the second bore segment forming a deformable region of the shank and having an external wall diameter, the foot end having a foot end diameter, wherein the foot end of the shank comprises a tapered chamfer making a foot end angle of 21 to 25 degrees with the longitudinal axis (X), and wherein the ratio of the foot end diameter to the external wall diameter is between 0.65 and 0.82.

Disclosed is a fastener that includes a nut with a threaded bore that includes a head on one end, a cylindrical outer surface and a tapered ramp on the other end, a bolt that includes a head, a threaded portion engaged with the threaded bore, a recess next to the bolt head and an enlarged shank between the threads and the recess, where the outer diameter of the recess is smaller than a major diameter of the threaded bore of the nut and where an outer diameter of the shank is larger than a major diameter of the bolt threads, and a sleeve with a unthreaded bore positioned between the tapered ramp and the bolt head with one end crimped into the recess such that the internal diameter of the crimped sleeve bore is smaller than the major diameter of the threads on the bolt.

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 method is provided for installing a fastener into an opening of a structure. The fastener includes a sleeve and a pin threadably received into the sleeve. The method includes inserting the fastener into the opening, grabbing a pintail of the pin, and deforming a tail of the sleeve radially outward relative to a centerline axis of the fastener by automatically displacing the pin longitudinally along the centerline axis relative to the sleeve. The method also includes rotationally shearing the pintail of the pin from a shaft of the pin.

A multipart adjustment element for a tolerance compensation arrangement for automatically compensating for tolerances in the spacing between a first and a second component. The adjustment element comprises a bush, a dragging element, a contact disc, and a securing sleeve. The bush has a bore, an outer thread with a first direction, and a step. The dragging element comprises at least one spring arm protruding radially inwards, wherein a first axial end of the dragging element is arranged on the step in the threaded bush. The contact disc is arranged adjacently to the first axial end of the threaded bush and has a through-opening. The securing sleeve likewise has a through-opening and is arranged at least partly in the bore of the threaded bush with a press-fit connection in order to securely connect the contact disc, the threaded bush, and the dragging element together.

Self-forming thread blind fasteners and methods for fastening are provided. The self-forming thread blind fastener comprises a sleeve and a pin. The sleeve comprises a first sleeve end, a second sleeve end, an elongate portion, and an inner wall defining a bore. The pin is configured to be at least partially received by the bore. The pin comprises a first pin end, a second pin end, a pin head portion, an at least partially threaded portion, a shank intermediate, and a driving portion. The at least partially threaded portion is configured to form threads on at least a portion of the inner wall of the sleeve. The driving portion is configured to receive a torque to rotate the pin within the sleeve and thereby axially compress and deform the sleeve and form the threads on the at least a portion of the inner wall of the sleeve.

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.

A blind fastener is disclosed having a head, a shaft with a tail, a tail of the blind fastener including the tail of the shaft and a sleeve surrounding the tail of the shaft, and a barrier secured to the tail of the blind fastener. The sleeve is configured to expand away from the tail of the shaft to form an expanded sleeve which is forced against a face of a workpiece to clamp the workpiece between the head and the expanded sleeve. The barrier is configured to be forced against the face of the workpiece to form a sealed cover around the tail of the blind fastener.

A blind fastener configured to be installed in a bore of a given length is disclosed and having a sleeve member configured to deform during installation of the blind fastener; a bolt member at least partially received within the sleeve member; and an insulating member fixedly disposed on the sleeve member. The sleeve member has a predefined outer surface region that is arranged to be disposed within the bore after installation of the blind fastener. The insulating member and the sleeve member are mutually configured such that the insulating member is present on a first sub-region of the predefined outer surface region and is not present on a second sub-region of the predefined outer surface region. Each of the first and second sub-regions comprises a complete circumference of the sleeve member.