Abstract: A fastener for members (M1, M2) to be clamped with a certain spacing therebetween includes a nut (10); a bolt (40); and a moveable collar (20) having in an inner bore thereof a torque transmitting device capable of transmitting torque of the bolt, which is axially inserted into the inner bore, to the movable collar through thread—thread engagement, and wherein a portion of the thread of the bolt includes special thread ridges (422), by which a frictional force is imparted to the thread—thread engagement.

Abstract: The invention relates to a bolt for integrally fastening a first member and a second member, which are spaced away to each other, the bolt comprising a cylindrical-shaped collar bolt provided on a portion of an outer peripheral surface thereof with an external thread portion and on an inner peripheral surface thereof with an internal thread portion; and a bolt body having in an area of one end of a shank an external thread portion capable of threading into the internal thread portion of the collar bolt and a head on the other end thereof.

Abstract: The invention relates to a bolt for integrally fastening a first member and a second member, which are spaced away to each other, the bolt comprising a cylindrical-shaped collar bolt provided on a portion of an outer peripheral surface thereof with an external thread portion and on an inner peripheral surface thereof with an internal thread portion; and a bolt body having in an area of one end of a shank an external thread portion capable of threading into the internal thread portion of the collar bolt and a head on the other end thereof.

Abstract: In an arrangement for attaching a pair of members to each other, a spacer member provides the function to extend and retract in the axial direction so that the positioning of a first member to a second member is facilitated because a gap may be defined between the two members before joining them to each other, and the dimensional precision between the steering hanger pipe and the front pillar of the vehicle body is not required to be unduly high. This gap is filled by the spacer member as a threaded bolt is fastened owing to the action of a reverse thread, and the two members can be firmly attached to each other without involving any unacceptable deformation of the two members.

Abstract: The present invention relates to a metallic, precise columnar member having an outer diameter with high accuracy, wherein the columnar member comprises a plurality of flattened thread ridges having a predetermined outer diameter provided on the surface of a metallic columnar blank in an axial direction. The method of the present invention comprises the steps of using rolling to form a plurality of thread ridges on the surface thereof and using rolling or drawing to make the tops of the thread ridges flat.

Abstract: The invention relates a fastener for members (M1, M2) to be clamped with a certain spacing therebetween, the fastener comprising a nut (10); a bolt (40); and a movable collar (20) having in an inner bore thereof a torque transmitting means capable of transmitting torque of the bolt, which is inserted axially into the inner bore, to the movable collar through thread-thread engagement, and wherein a portion of the thread of the bolt comprises special thread ridges (422), by which a frictional force greater than that obtained in engagement between normal threads is imparted to the thread-thread engagement.

Abstract: This invention relates to a bolt comprising a bolt shank formed at an outer peripheral surface thereof with external threads, and a nut formed at an inner peripheral surface thereof with internal threads, comprising a latch means for latching the nut with the bolt shank, which is provided on at least one of the bolt shank and the nut, the nut being separatable from the bolt shank and capable of being screwed onto the bolt shank, wherein the nut is movable relative to the bolt shank in a state of being screwed onto the bolt shank, when a larger torque than a predetermined torque is applied to the nut while the latch means latches the nut with the bolt shank.

Abstract: The invention has been accomplished in order to provide a method of manufacturing a columnar material of metal having an excellent dimensional accuracy without the need of much work time and cost, said method comprising equally forming a multiplicity of longitudinal grooves on an outer periphery of a column-shaped raw material of metal, and then uniformly squeezing tip ends of portions between the respective longitudinal grooves to make the same flat to obtain a target outside dimension.

Abstract: A hexagon head bolt having a head with an incline formed on each of the outer faces thereof so as to be inwardly inclined toward a respective corner of each face. Thus the head of the bolt can easily be engaged with the socket of an impact wrench or the like, without damage of the corners of the bolt. In another embodiment, a hexagon socket is provided having an incline formed on each of the outer faces thereof so as to be outwardly inclined toward a respective corner of each face.