A telescopic mechanism including hollow telescopic blade segments with a threaded spindle having spindle threads within the telescopic blade segments. Nuts are configured to correspond and interface with the spindle, and a power mechanism is configured to spin the spindle. Each of the nuts respectively interfaces at the proximal portion of each of the hollow blade segments and the nuts have nut threads corresponding to the spindle threads. The nut threads allow back and forth movement over the spindle threads when the spindle is rotated; however, the nut threads will slide over the spindle threads if the distal telescopic blade segment is pushed above a given threshold force.

The invention is an expanding, anchoring screw, made of expandable polymer material. The screw shaft is hollow. After inserting screw in a material, by allowing two reagents to mix in the hollow shaft, and a polymerization chemical reaction to occur, the reagents increase in volume exerting pressure against the inner surface of the hollow shaft, expanding the shaft, and applying greater anchoring force against material in which the screw is inserted.

A high temperature fastener including a bolt and a nut, where the bolt and the nut are constructed of an aluminum oxide ceramic material reinforced with silicon-carbide crystal whiskers or silicon nitride.

The invention concerns a timepiece member including a first axis and a first threading intended to cooperate with 5 a second threading provided on a second timepiece member. The first threading is configured so that a zone of contact between the first threading and the second threading extends over less than 50% of the height of the threads of the second threading or is configured so that the zone of contact between the first 10 threading and the second threading extends over less than 0.3 times the pitch of the threading.

The present application provides a nut fastener, comprising a mounting nut and an adjustment bolt. The mounting nut comprises retaining arms and a nut receiving passage. The adjustment bolt is configured to be at least partially received in the nut receiving passage and comprises a bolt receiving passage. A bushing is arranged in the bolt receiving passage of the adjustment bolt and over molded onto a side wall of the bolt receiving passage by means of two-shot injection molding. The nut fastener in the present application is easy to mount and use.

An optimized thread profile (140) for joining composite materials is presented. This thread profile (140) maintains a certain material strength when used as part of a composite threaded joint (101). The thread profile (140) comprises a repeating pattern of four components: a crest region (150), a first flank (162), a root region (170) and a second flank (164). The thread profile (140) is symmetrical, that is, the dimensions of the four components do not change throughout the length of the thread profile. The crest (152) has a flat profile and the root (172) has a rounded profile. When a shaft (120) is affixed to a joining shaft (110) using this optimized thread profile (140), the flat profiles of the crest (152) of the shaft (120) and corresponding rounded profiles of the root (172) of the joining shaft (110) create a gap to accommodate a substance such as an adhesive or a lubricant. Similarly, the flat profiles of the crest (152) of the joining shaft (110) and corresponding rounded profiles of the root (172) of the shaft (120) create a gap to accommodate a substance.

A sleeve (20) for centering fasteners during the assembly of components such as facade elements on the substructure of a building envelope includes a sleeve body (23) and a connection bracket (25). The sleeve body (23) has a plurality of sleeve elements (21, 22) which are grouped around a central center axis A and are spaced apart from each other by gaps running in the sleeve longitudinal direction. At least a first (21) and a second (22) sleeve piece are connected to each other at an axial longitudinal end of the sleeve body (23) by a separable connection bracket (25), preferably the connection bracket is separable via predetermined breaking points. Such a sleeve is used in the construction of facades, wherein it is inserted into a pilot hole of a facade element, the connection bracket is broken off and a fastener is inserted into the sleeve. Driving the fastener centers the fastener in the sleeve and the sleeve is removed from the pilot hole.

The invention relates to a fastening screw, comprising an electrically insulating insulating body and a metal body formed from a metal and having an external thread. The metal body is fastened on the insulating body and has a first axial end and a second axial end opposite the first axial end, wherein the first axial end is remote from a screw head of the fastening screw. It is provided that the insulating body, by means of a shaft portion, emerges from the first axial end of the metal body along the longitudinal axis (L) of the metal body.

A screwdriver device for a threaded plug includes a structure which extends along an axis and includes a head and a shank connected to a first end of the head, wherein the head has a second end which opens onto a cavity suitable for containing a head of a plug, wherein along the axis the cavity includes at least a first portion having a lateral surface which has a first profile and at least a second portion having a lateral surface which has a second profile which is not coincident with the first profile.

A system includes an attachment part and a holding element for holding the attachment part on a carrier part, the holding element having a threaded part connected to the attachment part and an internal thread for a holding screw, and a spacer part, the spacer part and the threaded part having interacting threads, the spacer part having a through opening flush with the internal thread of the threaded part when the spacer part is screwed to the threaded part, with the result that the carrier part can be held between a head of the holding screw and the spacer part, the threaded part having a holding section for holding the attachment part, the holding section having at least one latching element which interacts with at least one corresponding latching element of the attachment part for releasably latching the attachment part on the threaded part.