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: Disclosed embodiments relate to a fastener operable to be received into an opening defined in a plate. The fastener may include a modular sleeve having an actuatable mechanism operable to prevent the rotation of the fastener relative to the plate. The modular sleeve may be moved from a non-actuated first position and an actuated second position to actuate the actuatable mechanism. A portion of the modular sleeve may be accessible from a top side of the head of the fastener through a plurality of channels in the head, and the modular sleeve may be accessible through the plurality of channels in the head in order to actuate the modular sleeve.

Abstract: A flanged hexagon head bolt can fasten the bolt by a stable fastening axial force, and can stop rotating the fastened bolt. When the bolt is fastened, a flat bearing face of a circular disk shape flange is brought into face contact with a flat bearing face of a flange portion. Up to the stage, the flanged hexagon head bolt is the same as a bolt which does not have recessed and protruded portions, a variation in a fastening torque is small, and a fastening axial force of the bolt is stabilized. When the bolt is further fastened, the bearing face of the flange portion is inclined, and the recessed and protruded portions of the circular disk shape flange bite an inclined root portion of the bearing face of the flange portion.

Abstract: A part mounting grommet comprises an outer grommet and an inner grommet inserted into the outer grommet and supported by the outer grommet, and supports a part provided with a mounting member beforehand on a vehicle main body. The outer grommet has a clearance in a radial direction with a mounting hole drilled in the vehicle main body, a first stopper stopped by the outer edge of one side of the mounting hole on one end thereof, and an elastically deformable first latching piece latched with the outer edge of the other side of the mounting hole. The inner grommet has a clearance in the radial direction with the outer grommet, a second stopper which abuts with the first stopper, and an elastically deformable second latching piece latched with the other end of the first stopper. The outer grommet and the inner grommet are respectively movable in the radial direction.

Abstract: A fastener having a bolt and a threaded swageable collar. The bolt includes a head portion, a flange portion, and a shank portion which extends through two aligned apertures formed in adjacent panels. The shank portion includes a threaded gripping portion and a locking groove adjacent to the gripping portion. The collar is cylindrical having an internally threaded section and a swaging section whereby the collar is fastened to the bolt by threading the threaded section of the collar onto the threaded gripping section of the bolt and swaging the swage portion of the collar into the locking groove of the bolt.

Abstract: A method of fastening a first member to a second member. The first member has a first opening with first left handed threads that extend from a first surface to a second surface. A stud having a shaft with a first section having right handed threads that extend from an end to a first groove, a second section with second left handed threads that extend from the first groove to a second groove adjacent a head and a radial surface that extends on an angle from the second groove toward a peripheral surface on the head is obtained from a supply source. The shaft is inserted into the first opening to engage the first and second left handed threads and an initial torque is applied to the head to bring the radial surface into engagement with the first left handed threads. Thereafter, additional torque is applied to the head to cause the radial surface to engage and deform a portion of the first left handed threads as the peripheral surface is moved into engagement with the second surface.

Abstract: A self-locking nut for eye glasses excellent in assembling efficiency into which a male screw is fitted to secure a material between the head of the male screw and the self-locking nut itself, comprising a first member having a female thread portion formed with a female thread in which the male screw is screwed and a pressing end face for pressing the material when the male screw is screwed in, a second member which is continuously formed on the other end face of the first member away form the material and which has a self-locking hole concentric with and connected to the threaded hole, and a third member continuously formed on the end face of the first member closer to the material and having a bushing portion which can be inserted into a hole in the material and which is formed with a through hole connected to the threaded hole of the first member; a moisture-proof nut comprising a sealing element having one end closed to bring the other end into contact with the material to waterproof the main body of the

Abstract: A self-locking nut for eye glasses excellent in assembling efficiency into which a male screw is fitted to secure a material between the head of the male screw and the self-locking nut itself, comprising a first member having a female thread portion formed with a female thread in which the male screw is screwed and a pressing end face for pressing the material when the male screw is screwed in, a second member which is continuously formed on the other end face of the first member away form the material and which has a self-locking hole concentric with and connected to the threaded hole, and a third member continuously formed on the end face of the first member closer to the material and having a bushing portion which can be inserted into a hole in the material and which is formed with a through hole connected to the threaded hole of the first member; a moisture-proof nut comprising a sealing element having one end closed to bring the other end into contact with the material to waterproof the main body of the

Abstract: Axially-extending troughs in a bark of an internally-threaded collar receive setting balls of a driver that apply a torque to the collar through the balls bearing on the walls of the troughs. At a predetermined pre-load, the balls fail the bark and plow through it to develop circumferential furrows, and the torque application on the collar ends. A second torquing with balls at a different axial position fails the bark again at the same pre-load to compensate for any relaxation after the first torque application.

Abstract: A screw equipped with locking means, includes a female thread made of a synthetic resin and a male thread made of a metal, or a female thread made of a synthetic resin and a male thread made of a synthetic resin, fitted with each other, the female thread having a double cylindrical boss portion formed at the center thereof so that the male thread may be fitted into the innerside boss portion and the thread portion of the boss may be deformed more or less when pressed against the shaft of the male thread in the direction perpendicular thereto through the resilience of the synthetic resin, which is the material of the female thread, by pressing the terminal end of the innerside boss portion against the flange portion of the male thread or a member to be fixed at the final stage of clamping the screw. A female threaded nut may have a blind bore with a projection at the bottom for engagement and deformation by a cutter on the end of a bolt.

Abstract: A support pin system which is a non-welded system for fastening a first structural member, such as a nuclear reactor control rod guide tube flange, to a second structural member, such as nuclear reactor upper core plate, includes a support pin and nut. A first pin portion passes through the first member and has a threaded section which mates with the nut. A second pin portion has a solid body section and a split-leaf base section which biasingly engages a bore in the second member. The solid body section is accommodated by a close clearance fit. The split-leaf base section has an intermediate diameter which is less than the diameter of the solid body section. Thus, loads applied transversely to the system are reacted substantially in pure shear through the solid body section. The nut may be a locking nut having a crimpable cylindrical section integrally connected to an internally threaded section.

Abstract: A stem travel limiting apparatus provides a relatively tamper proof limit setting device for an adjustable valve stem. In a preferred embodiment, an internally threaded annular collar is positioned about an externally matingly threaded stem, the collar having a spaced gap in its annular body. A locking ring is positioned over the collar, and is of a size relative to the collar to develop sufficient force over the collar to partially close the gap and to force the threads of the stem and collar into distortion. The apparatus is positioned along the stem during assembly of a control valve to thereby provide a limit to a manually adjustable setting of the control valve.