Abstract: A fastening element with a nut and a thrust washer is provided. The nut includes an interior portion with an internal thread and an abutment surface at one end. A snap edge radially encloses the abutment surface and has a nose edge projecting radially inward, with a chamber being formed between the abutment surface, the snap edge and the nose edge. The thrust washer has an interior recess, a flanged portion and a cylindrical portion, with an outside diameter of the flanged portion being greater than an outside diameter of the cylindrical portion. The flanged portion, the cylindrical portion, the snap edge and the nose edge are coordinated with one another, with the nose edge projecting into the interior of the nut such that the nose edge and the snap edge at least partially enclose the flanged portion of the thrust washer.

Abstract: A fastener assembly is provided. The fastener assembly includes a nut having an internally threaded portion and an annulus extending from the nut and configured for receiving the shank of an elongate fastener. A compression collar is configured for deflecting the annulus into at least one of fixed engagement with the shank or to impart a spring bias of the annulus against the compression collar upon tightening of the nut about a working surface.

Abstract: A fastening material for fastening a fastening object material between itself and a screw, said fastening material includes a burred portion forming a screw hole and projecting in a substantially cylindrical shape in a screw inserting direction, wherein said burred portion has a wave-like shape portion waving in a circumferential direction of the cylindrical shape.

Abstract: A fastener assembly is provided. The fastener assembly includes a nut having an internally threaded portion and an annulus extending from the nut and configured for receiving the shank of an elongate fastener. A compression collar is configured for deflecting the annulus into at least one of fixed engagement with the shank or to impart a spring bias of the annulus against the compression collar upon tightening of the nut about a working surface.

Abstract: A compression seal assembly that can be installed on a wall without requiring access to both sides of the wall. The compression seal comprises a core member, a split washer, a gasket, and a first nut. The core member includes a cylindrical body and a flange rigidly attached to the cylindrical body. The cylindrical body includes a smooth cylindrical portion separating the flange from a first set of threads. The split washer is helical shaped and has a first end and a second end. The split washer is ramped through the hole until the split washer is entirely on the first side of the wall. A gasket is then inserted onto the smooth cylindrical portion adjacent the second side of the wall, and the first nut is threaded onto the first set of threads. As the first nut is tightened, the split washer, the wall and the gasket are compressed between the flange and first nut.

Abstract: A bolt retainer for mounting a bolt having a head portion and a shank portion to a bottom wall of a kettle includes a pair of spaced apart side walls, a bottom wall extending between the pair of side walls and a notch formed in the bottom wall. The pair of spaced apart side walls and the bottom wall define a cavity that is configured to receive the head portion of the bolt therein with the shank portion of the bolt extending through the notch in a direction away from the bottom wall of the kettle.

Abstract: A washer (14) and a threaded assembly (22) between a screw (30) and a workpiece (42) are provided. The washer (14) is offset up to an angle (?) with respect to a flat initial state, such that the washer has an insert thickness (De) that is substantially greater than the initial thickness (Da) thereof. The washer (14) is made of a malleable material. The length (Lg) of an unthreaded shank section (40) of the screw (30) is smaller than the sum of the thickness (Dw) of the workpiece (42) and the insert thickness (De) of the washer (14), and essentially not smaller than the sum of the thickness (Dw) of the workpiece (14) and the insert thickness (Da) of the washer (14). When the last thread of the screw (30) leaves the workpiece (42) on being screwed in, the force previously exerted on the washer (14) by the feed of the screw is zero.

Abstract: Self-locking nuts help prevent the nut from backing off of a spindle or other type of threaded shaft. A single piece nut assembly is provided that is self-locking and comprises a nut subassembly and a washer subassembly. Nut and washer subassemblies are secured together, and do not require any special tools for installation or removal. The washer has an edge which is formed/rolled over a lip extending from the bottom edge of the nut when assembled to provide the unitized assembly. The nut and washer are held apart by a spring, such as a wave spring, until the washer contacts the face of the object to which the nut is being secured. At this point the spring is compressed to engage the nut with the washer, and engage holding elements located in the nut with a holding feature located on the washer and prevent movement between the washer and nut.

Abstract: A fastener assembly for use in a joint in a work-piece comprises a first fastener component for extending through a hole in the work-piece, a second fastener component and a resilient element. The first component has a first contact portion for engaging the work-piece. The second fastener component has a second contact portion for cooperating with the first fastener component to compressively load the work-piece thereby forming the joint. The resilient element is located between the first and second contact portions so that it is it is compressed under load. The resilient element has a first stiffness characteristic when subjected to loading less than a predefined amount and has a higher stiffness characteristic when subjected to loading more than the predefined amount.

Abstract: A washer for a fastening element, having a circumferential flange, having an annular washer body provided with an opening, and having at least one holding web, wherein on the inner face of the opening there are disposed at least two claws, which jut radially into the opening.

Abstract: A threaded fastener for securing workpieces with a determinable desired clamp load and including a nut assembly and a bolt with the nut assembly including a nut member with a lock base having a load ring portion and a boss portion with the boss portion adapted to be located in a retention counterbore in the nut member and being of a length to provide a gap between the load ring portion and nut and at a predetermined load to collapse and close the gap and be deformed radially into compressive engagement with the threads of the bolt to provide prevailing torque type lock structure resisting loosening of the nut assembly from the bolt with the predetermined collapse load providing the desired clamp load and with the gap closure visibly indicating attainment of the desired clamp load.

Abstract: A stack of parts, such as the stator disks of a turbomolecular pump, the parts being stacked alternately with spacers, includes a spacer having a knife-shaped deformable portion. When the stack is installed for the first time, the portion is compressed so as to take up the tolerances of the stack between abutment surfaces, e.g. delimited by a pump body and a corresponding casing. The invention applies in particular to turbomolecular pumps and aims to eliminate the operations of adjustment, re-machining, or matching that are usually required when installing a stator assembly.

Abstract: Apparatus for retaining a threaded device in association with an article when the article is disengaged from another. The apparatus is intended for mounting on the article and has a center section formed with a center aperture sized for receiving the threaded device. A pair of elongated arm members each extend from opposite edges of the center section and are formed over onto a surface of the center section with an inner edge thereof configured to extend into the center aperture and engage the threaded device when the threaded device is inserted into the center aperture. The elongated arms are in compressed engagement with the surface of the center section when the threaded device secures the article to another article and expand when the threaded device is disengaged from the other article to cooperate with each other in securing the threaded device to the article.

Abstract: A tri-lobular section of a bolt receives a mating tri-lobular bore of a washer to prevent the washer from rotating. Roll formed male threads on the tri-lobular section of the bolt receive a cooperating nut. The nut has a base shaped for wrench engagement, a thin walled barrel, a spring temper, and a threaded bore. The thread of the nut has two thread diameters: a large diameter thread in the base and a smaller diameter thread in the barrel continuing from the base thread; both thread sections have the same pitch. The barrel thread is substantially circular when relaxed. The barrel elastically flexes in response to the lobes of the nut as the lobes turn in the barrel, and when rotation stops, the barrel generally conforms to the tri-lobular shape of the bolt to form a thread lock, but the base does not.

Abstract: A screw coupling safety mechanism to prevent unintentional loosening of the sleeve nuts is disclosed. The safety mechanism is formed from a first toothed disc and a second toothed disk each preferably with the same diameter. Safety catches are arranged on the inner circumference of the first toothed disk for locking the first disk in position with respect to one of the sleeve nuts. Safety catches are also arranged on the inner circumference of the second toothed disk for locking the disk in position with respect to the other sleeve nuts. Retaining springs are disposed on the inner circumference of the second disk for maintaining separation between the two disks. One of the toothed disks preferably features an even number of teeth and the other toothed disk preferably features an odd number of teeth. One tooth on one disk is then bent into a space between two teeth on the other disk, after engaging the safety catches, to prevent rotation of the nuts.