Abstract: A self-tapping screw includes a head portion, a lower side thereof configured with a screw rod, a front end thereof configured with a drill tail, a first thread segment formed on a front end of the screw rod above the drill tail, a second thread segment with at least two threads formed on a rear end of the screw rod immediately below the head portion, a crest angle of any one of the threads of the second screw segment being 1.15 to 1.2 times of a crest angle of any thread of the first thread segment, and a thread root diameter of the second thread segment increasing proportionally with the crest angle of the second thread segment. Whereby, the present invention provides a self-tapping screw capable of tight locking without idling.

Abstract: The invention relates to a securing means for a screw having an annular sleeve for insertion in a through-hole in a workpiece, characterized in that the annular sleeve is provided with at least one plate-like resilient tongue which extends from the annular sleeve and which projects in the direction toward a longitudinal center axis of the sleeve.

Abstract: A fastening structure includes: plural overlapping co-fastened members, a clearance hole being formed at at least one mating face of mutual mating faces of the plural co-fastened members, and a screw utilizing frictional heat to bore a hole and form a thread, passing through the clearance hole, and fastening the plural co-fastened members together.

Abstract: A cap for a temporary fastener comprises a hollow, cup-shaped body and an inwardly tapered neck. The hollow body fits over a workpiece-engaging portion of the temporary fastener, and the neck extends from the hollow body. The tapered neck terminates in a hollow tip that is sized and configured to fit over aligned holes in the joined workpieces and to contact a minimal surface area of the outermost workpiece to reduce surface damage to the workpieces such that any damage will be removed when the holes are countersunk in the normal course of assembly.

Abstract: The present invention relates to a unit (10) for a locking device, including: a nut (12) comprising first (18) and second (20) coaxial taps in opposite directions; and a ring (13); said ring including a third tap (38); the first (18) and third (38) taps being capable of engaging with a single first thread (22); said ring including a second thread (40) capable of engaging with the second tap (20) of the nut. A portion (33) of the ring, projecting relative to the second thread (40), includes a through-hole (60); and a surface (16) of the nut includes a visual marking, configured to be opposite the hole (60) when the nut and the ring are in an installation position, and separated from said hole when the nut and the ring are outside said installation position.

Abstract: Various embodiments described herein provide a fastener system having straight walled driving surfaces that provides a reliable stick fit feature, while also improving stability of engagement between the system components. A feature of the new system is to allow stick fit engagement of existing standard straight walled drivers in the new system.

Abstract: A washer and retained nut assembly has a washer with a retaining flange and a positioning cavity and a nut received in the washer. The nut has a shoulder received in the positioning cavity with a top surface of the shoulder engaging a lower surface of the retaining flange in a loose condition of the washer and nut. The nut further has an engagement surface contacting a receiving surface in the washer in an engaged position of the washer and nut. The nut further has a peripheral surface engaging a blocking surface in the washer with the nut and washer in a maximum offset angle orientation between the washer and nut in the engaged position.

Abstract: An appliance and fastening assemblies therefore are provided. A method of mounting an object to a part of an appliance using a fastening assembly is also provided. In one aspect, a fastening assembly of an appliance includes a wall defining an engagement hole. The fastening assembly also includes a tab connected to the wall and defining a clearance hole. The tab is folded over onto the wall such that the clearance hole is in communication with the engagement hole. A fastener of the fastening assembly has a head and a shank extending from the head. The shank has threads along at least a portion of the shank. The shank of the fastener is received through the clearance hole and the engagement hole. When the fastener is torqued or driven, a portion of material of the wall is extruded into the clearance hole of the tab.

Abstract: A stay rod assembly for a fluid pump has a rod with the first threaded section at one end and a second threaded section at an opposite end thereof with a stud portion located between the first threaded section and the second threaded section, and a sleeve positioned over the stud portion of the rod. The stud portion is tapered so as to narrow diameter from the first threaded section to the second threaded section. The stud portion has no shoulders thereon. The rod is received in an interior of the sleeve.

Abstract: A retention device for supporting a component relative to a wall of a home appliance is provided. The retention device includes a backing nut and a core piece that can be installed from a single side of the wall. The backing nut defines a central bore and includes a threaded surface. The core piece includes a body having a threaded portion configured to mate with the threaded surface of the backing nut and at least one flange projecting outwardly from a body of the core piece. The core piece is configured to be inserted into an aperture in the wall and rotated to engage the at least one flange with the wall.

Abstract: A disclosed tolerance compensator system reduces or avoids bending of components when the components are fastened to each other, thereby increasing the reliability of the components. The limited number of parts of the tolerance compensator system simplifies manufacturing and reduces costs. A disclosed method for fastening components together using the tolerance compensator system reduces or avoids bending of components, increases the reliability of the components, reduces fastening times, and simplifies fastening procedures.

Abstract: A locking apparatus for locking the rotational position of a fastener component which is rotatable about an axis relative to a structure. The locking apparatus includes a collar and a rigid arm. The collar is configured to engage with the fastener component such that relative rotation of the collar and the fastener component is substantially prevented. The arm has a first end configured to engage with the collar such that rotation of the collar relative to the first end is substantially prevented, and a second end configured to engage with the structure such that rotation of the arm relative to the structure is substantially prevented. The collar has an inner surface having a first finite order of rotational symmetry about the axis, and an outer surface having a second, larger, finite order of rotational symmetry about the axis.

Abstract: A screw includes a head and a shank extending from the head, and a hole-enlarging portion formed on the shank. The hole-enlarging portion features no thread and a substantially triangular transverse section. The hole-enlarging portion includes three inclined edges spaced from one another in the circumferential direction of the shank, and a guiding slope is formed between two adjacent inclined edges. The shank defines a longitudinal axis and is provided with a thread. Each inclined edge extends toward the head in an inclined direction relative to a horizontal axis perpendicular to the longitudinal axis. The inclined direction of each inclined edge is identical to a direction in which the thread extends toward the head.

Abstract: A wood screw, including a cylindrical screw shank, at the end of which there is formed a tip, a screw head, which is formed at the other end of the screw shank, as well as a threaded section, which extends from the tip in the direction of the screw head, wherein the threaded section has a thread core and a thread winding having several threaded turns circulating the thread core, wherein several successive threaded turns have projections, which are formed alternatingly in essentially the direction of the screw head and in essentially the direction of the tip.

Abstract: A hollow cover is provided for retaining a fastener captive on a removable part. The cover has an internal surface tapering from a first open end to a second open end. The first open end is sized to permit positioning of the fastener inside the hollow cover. The second open end is sized to block passage of the fastener. The second open end defining a tool opening configured to receive a tool for engagement with the fastener inside the hollow cover.

Abstract: A bolted joint providing a “zero-clearance” fit formed from a bolt including a shoulder that works during installation to cold form a deformable sleeve. The bolted joint joins a bolt receiving member to a clamped component. One or more bolted joints may be used and as the bolts are installed, shoulders on each of the bolts dilate deformable sleeves until the outer diameters of the sleeves contact internal walls of through holes in the clamped component. Each of the deformable sleeves includes at least one groove or flute on its interior surface that results in: reduced radial load on internal walls of the clamped component and the bolt receiving members, and less friction between the sleeve and both the clamped component and a counter bore disposed within the bolt receiving member, thereby allowing for smaller percentage of the bolt's tensile strength capability required to deform the sleeve.

Abstract: A self-tapping screw made of synthetic material has a threaded shank defining a screw center line. The screw has proximal and distal insertion ends, the shank including first and second portions, the second proximal to the first. The pitch is the same in the first and second portions, and has a complete thread cross-section in the second portion. In the first portion, in the direction of the thread, the thread is divided into segments having an incomplete thread cross-section, the thread segments having leading end and trailing ends. The leading end of one thread segment extends further radially than the leading end of the thread segment preceding it and forms a cutting edge. In most of the thread segments the thread top in question, for substantially its full length, starting with the leading end, considered in thread direction, is situated at a constant radial distance from the center line.

Abstract: A screw, especially for wood, has a knurled region (10) with two sets (11A, 11B) of ribs (11) that are offset from each other by an azimuth angle. For example, the two sets of ribs extend towards each other from opposite ends (10A, 10B) of the knurled region (10) and are intertwined only in an overlap region (12) that is at the middle of the knurled region.

Abstract: In order to prevent wood fringes at the edge of a hole from a countersunk screw (1), the screw-head (2) is provided with a tapering underside and inclined milling-ribs (8) on the tapering underside. Each milling-rib (8) has a planar front-side (15) delimited by smoothly curved convex milling-edge (17) for milling the material during countersinking of the screw-head (2).

Abstract: A sealing system and a method for sealing a metal fastener and members having dissimilar metals for a header connector or a connector device from electrolyte in an area where, in the header connector or the connector device, certain dissimilar metals may be in contact. The metal fastener and other adjoining or abutting dissimilar metals are sealed by a non-conductive seal from electrolyte, thereby protecting the metal fastener and the other adjoining or abutting dissimilar metals from galvanic corrosion and subsequently protecting the integrity of the header connector or the connector device.