A self-tightening fastening apparatus for vibrating work-parts includes a male fastener, a main female fastener, a locking female fastener, an anti-rotation female fastener, and a first compression body. The main female fastener is threadedly engaged around a first threaded-shaft section of the male fastener, wherein a head of the male fastener and the main female fastener compress the vibrating work-parts together. The locking female fastener is threadedly engaged around a second threaded-shaft section of the male fastener. The first compression body is compressed in between the main female fastener and the locking female fastener. The anti-rotation female fastener is threadedly engaged around a third threaded-shaft section of the male fastener.

A thermally releasable fastening element, in particular for fastening a door actuator, includes a base body, which is designed to be inserted into a recess or a number of aligned recesses, a core inserted into the base body, at least partially made of a shape memory material, wherein the base body has an unstable area, which is stabilized by the core, and wherein the core is designed to withdraw at least partially from the unstable area upon thermal activation of the shape memory material.

An improved clamping mechanism to secure a tire between a bead ring and a wheel utilizing a bolt. The bolt has a ball seat that pivots within an enlarged pilot hole in the bead ring as the bolt threads engage in threaded section of the wheel, pulling the bead ring toward the wheel, eventually leveraging off a fulcrum on either the bead ring or wheel against the tire bead bundle and pressing down the tire bead to lock it in place against the wheel. As the bead ring can pivot within the enlarged pilot hole around the bolt, the bolt is not stressed. Further, the wheel comprising a safety bead and non-skid coating on the inner wall of the wheel to prevent the wheel sliding around the wheel.

A fixing system for a rocker arm of a vehicle suspension has a threaded rod having a first thread, a second thread and a locking cavity. The fixing system has a first cam, integral for rotation with the threaded rod by shape-fitting coupling, a second cam integral for rotation with the threaded rod by shape-fitting coupling, a first nut, screwed onto the first thread to lock position of the first cam, and a second nut, screwed onto the second thread to lock position of the second cam and having a locking portion having a circumferential groove and a positioning hole passing through the circumferential groove. An elastic clip shaped as an open ring is accommodated in the circumferential groove for retaining a pin in the positioning hole. In a screwed position of the second nut, the pin fits into the locking cavity and locks the position of the second nut.

A main housing portion of a portable information handing system. The main housing portion includes: a top cover portion; a bottom cover portion; and, an information handling system locking system, the information handling system locking system including a bottom cover locking component, the bottom cover locking component being mounted to the bottom cover, the bottom cover locking component defining a bottom cover locking portion aperture, the bottom cover locking portion aperture being aligned with the top cover aperture.

A load indicator apparatus which is compact, portable and detachably mounted on the tie-rod. The load indicator apparatus includes a first reference fixture configured for attachment at a first position on the tie-rod, a second fixture configured for attachment at a second position on the tie-rod and an elongation gauge extending between the first reference fixture and the second fixture and configured to measure displacement of the second fixture relative to the first reference fixture during elongation of the tie-rod. A displacement transducer is connected to the second fixture to measure a capacitance value proportional to the loading acting on the tie-rod and transfers it to a load monitoring unit which translates the measured capacitance into a visual load reading and an electronic load output value.

A screw includes a head having and a stem with spaced apart threads. The thread of the thread of the screw includes flat spots and sloped section, and is sized, such that it can securing attach through a hole in the pegboard without damaging the hole despite the thread being wider than the hole.

A method of repairing a chain can include aligning a bore of an outer chain link with a bore of an inner chain link, inserting a pin through the aligned bores, the pin having a thread end opposite a head end, engaging a multi-jackbolt tensioner with the thread end of the pin, the multi-jackbolt tensioner having a plurality of fasteners, advancing each of the plurality of fasteners to press on the outer chain link, and forming an interference fit between the pin and the outer chain link at the bore of the outer chain link from the advancing of the fasteners.

A screw has a screw head and a shank extending downwardly from the screw head. The shank has a threaded segment, a cutting segment, and a tapered segment sequentially arranged downwardly, a thread spirally surrounding an external surface of the shank from the threaded segment to the tapered segment, multiple cutting ribs arranged around the external surface of the shank on the cutting segment of the shank, and multiple chip recesses formed between the cutting ribs. Each of the cutting ribs has a rounded crest to enlarge a drill hole and to reduce a resistance formed between the cutting ribs and the workpiece during drilling. The screw can be easily screwed into the workpiece with less driving force.

A screw-latching assembly is provided. The assembly includes a screw with a head, a tip, and a body between the head and tip. The body includes a threaded portion adjacent to the tip and an unthreaded portion adjacent to the head, and the unthreaded portion includes a built-in collar with an outer diameter larger than that of the body. The assembly includes a supporting bracket supporting and partially encompassing a first portion of the screw. The supporting bracket includes a base and multiple sidewalls, with a first sidewall comprising a first opening to allow a second portion of the screw to extend out of the supporting bracket and a second sidewall comprising a second opening to allow access to the head by a torquing tool. The assembly includes a spring surrounding at least a portion of the body, with the spring positioned between the built-in collar and the first sidewall.