Abstract: A weld nut assembly, including: an annular flange structure; and an annular body structure coupled to the annular flange structure; wherein the annular flange structure and the annular body structure collectively define an inner bore, wherein at least a portion of the inner bore defined proximate the annular flange structure defines threads adapted to receive a screw disposed within the inner bore. The weld nut assembly further includes an annular washer or bottom structure coupled to the annular flange structure. Optionally, the weld nut assembly further includes an annular ring projection and a plurality of circumferential weld protrusions coupled to the annular flange structure. The annular flange structure is adapted to be welded to a surface of a body panel or other structure of a vehicle with the inner bore aligned with a hole formed through the body panel or other structure, the hole adapted to receive the screw therethrough.

Abstract: A self-locking threaded connection element can be a screw or a nut, and includes a thread with a set of several turns. The thread has a thread pitch which varies from one turn to another and which enables the element to be self-locking, without seizing.

Abstract: A fastener includes an elongated body having a first end and a second end, a helical thread having a crest, a root, and flank portions formed on at least a portion of the elongated body, and at least one protrusion extending from the crest and flank portion. The at least one protrusion is an axially extending V-shape of the crest, flank portions, and root of the helical thread with a peak of the at least one protrusion having a ridge that extends radially outward from the root of the thread.

Abstract: A fastener includes an elongated body having a first end and a second end, a helical thread having a crest, a root, and flank portions formed on at least a portion of the elongated body, and at least one protrusion extending from the crest and flank portion. The at least one protrusion is an axially extending V-shape of the crest, flank portions, and root of the helical thread with a peak of the at least one protrusion having a ridge that extends radially outward from the root of the thread.

Abstract: A connection element (1) has a thread (2) that can be made to engage with a mating thread such as, for instance, a nut. The thread includes locking means (3) that acts upon the mating thread. The locking means (3) are formed by flanks (4, 5; 6, 7, 8, 9) of at least one section (10; 11) of the thread (2) whose arrangement with respect to each other is changed vis-à-vis the arrangement of the flanks (18, 19) of the thread (2) outside of the locking section (10; 11) in such a way that, when the thread (2) engages with the mating thread, a locking force is generated on at least one of the flanks (4, 5; 6, 7, 8, 9) of the locking section (10; 11).

Abstract: A fastener is provided including an elongated body having a first end and a second end, and a helical thread formed on at least a portion of the elongated body where the thread has a crest, a root, and flank portions. The helical thread has at least one protrusion extending from the crest and flank portions toward the first end of the elongated body, and each protrusion has a peak that extends to the root of the thread.

Abstract: A threaded fastener includes a shank having a tip and a head configured for engagement by an associated driving tool. The fastener is configured for use with an associated threaded opening. The head is disposed on the shank opposite the tip. The shank has a helical thread formed thereon. The thread extends from about the tip to about the head and defines a plurality of zones. Each zone has a plurality of individual threads extending 360 degrees about the shank. A leading thread in each zone is formed with a wave-form profile having an amplitude that is greater than the amplitude of each prior leading thread. In one embodiment, threads other than the leading thread in each zone do not have an amplitude as great as their respective leading threads. A fastening assembly is also disclosed.

Abstract: Screw provided with self-locking rolled thread, wherein, in a plurality of places along its extent, the thread is deformed in relation to the normal thread cross section in that the thread outside diameter is reduced by radial compression of limited thread portions, the area of the thread cross section being substantially identical to that of the undeformed thread. While maintaining the slant of the thread flanks, the thread cross section is symmetrically widened in the outer region and reduced in the adjoining inner region, the transition from the widened to the reduced thread cross section lying approximately in the centre of the respective thread flank, and the limited thread portion extends over two parts of a thread turn such that there result two symmetrically opposite thread portions each of approximately ? of the thread turn.

Abstract: A torque prevailing stud having a male component made of a shank with an outer wall that is threaded, a gripping component formed on the shank, and a wedge ramp rolled in a portion of the threaded outer wall. A female component having a body with a threaded bore that is used for engaging the male component. The threaded bore of the female component matingly engages a portion of the threaded outer wall and the wedge ramp when screwed thereon. The wedge ramp forces the threaded bore to conform to the shape of the wedge ramp thereby securing the male and female components together in a torque prevailing fit.

Abstract: In a nut disengagement prevention structure, a bolt has an external thread. A nut which is thread on the bolt has an internal thread. A thread portion which is the closest to a leading end of the bolt has a first minor diameter. Any other portion of the thread of the bolt has a second minor diameter which is smaller than the first minor diameter. The second minor diameter is substantially identical with a minor diameter of the internal thread of the nut.

Abstract: A threaded fastener is having a raised area or bump on a thread flank. The flank can be positioned on the nut thread or on the bolt thread. The bump forces the mating threads at least on one flank to have near zero tolerances along the pitchline of the threads and thereby eliminating play. A threaded repair insert having at least one raised area on a threaded surface also is provided.

Abstract: A threaded fastener is having a raised area or bump on a thread flank. The flank can be positioned on the nut thread or on the bolt thread. The bump forces the mating threads at least on one flank to have near zero tolerances along the pitchline of the threads and thereby eliminating play.

Abstract: A male screw which has a protrusion protruding from a thread thereof at least with regard to the normal direction to a flank of the thread. To obtain such male screw, a blank is introduced between rolling dies which are moved relative to one another and is rolled between the rolling dies to be formed with a thread. In this thread rolling process, the rolling pressure on an area of a die face of at least one of the rolling dies is determined to be higher than that in ordinary thread rolling process and the rear end portion of the area of the die face is made to bite into the blank, causing the corresponding portion of the blank to be forced out to form the protrusion.

Abstract: The bolt or stud shaft and nut combination includes an undercut of the first thread of the shaft adjacent the load face of the nut, the undercut having a compound fillet with the smaller radius lying between the larger radius and the first thread of the shaft. The shaft threads are buried two threads deep into the nut so that the first two teeth of the nut do not contact the threads of the shaft and overlie the undercut. The nut threads have a taper opening the pitch diameter in a direction towards the loaded face. The combination affords resistance to high-cycle fatigue of rotating structures joined together by the bolt or stud shaft and nut combination.

Abstract: A novel, self-sealing a headlamp adjustor mechanism is used to effect pivotal movement of a movable headlamp component in a headlamp arrangement. The headlamp adjustor mechanism includes a bushing having an initially unthreaded bore therethrough and an adjusting screw member having a shank. The shank of the adjusting screw member has a threaded portion and an unthreaded portion. When the adjusting screw member is rotated through the bore, female threads are cold-formed within the bore as the threaded portion contacts the bore and the cold-formed, female threads are deformed and collapsed against the unthreaded portion to seal the bushing against the unthreaded portion as the unthreaded portion contacts the cold-formed threads in the bore.

Abstract: The present invention relates to a male and female screw set wherein the male screw comprises at least a projecting part pressing against the flank plane of the female screw when the male and female screws are engaged. A dimensional difference is formed between the pitches of the female and male screw threads. When the female and male screws are engaged, the advancing side flank plane of the female screw thread is contacted by the advancing side flank plane of the male screw thread, while the other receding side flank plane of the female screw thread is contacted by other receding side flank plane of the male screw thread, and these respective flank planes are pressed together with tightening.

Abstract: A threaded fastener that self locks as it is tightened to a fastened object. The thread includes one or more portions that are shifted, resulting in one or more discontinuities in the thread. Each shifted portion of thread is fully formed at the discontinuity. The shifted portions will deform a relatively softer female thread, causing the deformed thread to move up and over the end faces of the shifted portions and to pack up in front of the end faces to prevent any significant loosening of the connection.

Abstract: A threaded connection structure for rotatably connecting and disconnecting adjoining members including a female member having annular internal pitched threads and a male member for threading into the female member having outer threads complemental to the threads of the female member with raised areas along the axial faces of the threads of one of said members to cause areas of concentration of unit pressure between the threads so that unwanted rotation and unwanted unthreading is prevented. A flange is provided on one member to engage a shoulder on the other member for continued axial surface pressure of the raised areas.

Abstract: The invention provides a screw nut comprising a central inner thread and a radially extending slit, the width thereof essentially corresponding to the diameter of the central inner thread. Thus, a threaded bolt or a threaded stud can be radially inserted into said screw nut body. In order to avoid that the screw nut is displaced away from the threaded bolt or stud during tightening of the screw nut, the central inner thread comprises a plurality of thread turns provided with axially extending recesses directed towards the end surface of the screw nut which is under load when the screw nut is tightened on the threaded bolt or stud.

Abstract: A double locked threaded fastening assembly includes a nut and a bolt. The bolt has a head at one end and threads adjacent its other end with a plurality of axially extending grooves located adjacent to the threads intermediate the threads and the bolt head. The nut has a work piece engagement end and a hollow bore extending through that end into the nut. A first portion of the bore proximal to the work piece engagement end is free of threads and a second portion distal from the work piece engagement end includes internal threads. The internal threads of the nut are capable of threading onto the external threads of the bolt to clamp a work piece under a clamping load between the head of the bolt and the nut.

Abstract: A screw-type fastening device including a male threaded element such as a bolt and a female threaded element such as a nut in which each element contains continuous helical root and crest disposed therein wherein the root and crest include cone-shaped crests and cone-shaped roots at an angle of about 45.degree. to 90.degree., respectively, external and internal chevron-shaped slots at angles of about 135.degree. to 225.degree., respectively, and three pairs of parallel load flanks, respectively, for easily releasing the threaded elements without abrasion and protecting them from self-loosening from each other.

Abstract: A male threaded fastener has a plurality of impressions on the nonload-bearing flank of the thread that receives material swaged from a collar to lock the collar and pin together and increase the breakaway torque of the collar. The impressions have a depth of about 0.1 to about 0.3 of the depth of the thread from root to crest. The thread is free of impressions at least 1.5 pitch lengths from its ends.

Abstract: A self-locking fastener combination including a standard female fastener element and a nonstandard male fastener element. The external threadform of the male fastener is characterized by an asymmetric flank angle arrangement and a step at the bolt threadform valley defined by an elevated portion which is of greater than nominal diameter and an adjacent depressed portion which may be of lesser than nominal diameter.