The present invention provides a removable blind fastener 2 having a first tubular element 4 comprising an arm portion 24, 26, 28, a second tubular element 6 comprising an arm portion 30, 31, 32, and an elongate screw member 8. The elements are arranged in telescoping relationship one with the other and which fastener, when in use as a temporary fastener, is caused to secure the component parts of an airframe by causing telescoping movement of the elements towards each other when the screw member is turned in one direction and is caused to release the component parts of the airframe by causing telescoping movement of the elements away from each other when the screw member is turned in an opposite direction. The arm portions of the elements are located in mutual juxtaposition for telescoping movement upon rotation of the screw member as aforesaid with end portions of elongate arms of the arm portions being brought into engagement with tapered sills 34, 36 of the first tubular element whereby the arms are caused to splay outwardly to bring the end portions into engagement with an underside 12a of the component and moving the component into secure temporary relationship with the component of the airframe.

A screw insert configured for repairing a stripped screw hole. The screw insert comprises three elongated prongs each having a distal end and a proximal end. The three elongated prongs are hingedly connected to each other only at the proximal ends thereof. The three elongated prongs are equiangularly spaced from each other so that longitudinal axes thereof are spaced apart. Each of the prongs has an outer surface and an inner surface. The screw insert is transformable from an open configuration to a folded configuration. The longitudinal axes of the prongs are coplanar in the open configuration. The longitudinal axes of the prongs define an acute angle therebetween in the folded configuration.

A self-fastening threaded insert (1) is described, with respect to a slab of building material, comprising a bearing element (10) with respect to the slab, a deformation element (20) adapted to interact with the slab, a supporting element (30) cooperating with the bearing element (10), wherein the deformation element (20) is deformed due to the effect of an external load transmitted by the supporting element (30), the deformation element (20) being adapted to transmit to the slab forces which are perpendicular to an application force of the external load to be able to fasten the threaded insert (1) to the slab. A process for assembling such threaded insert (1) is also described.

A blind fastening device is disclosed for fastening at least one piece to a base piece. The blind fastening device includes a connecting member inserted into a hole in the base piece, the connecting member being connected to the base piece by means of an elastically deformable member. The elastically deformable member is mounted on the connecting member by means of a closing element, wherein the mutual contact surfaces between the closing element and the connecting member are shaped in such a way as to establish a friction fit.