Abstract: A female portion arranged to form part of a thread joint for a percussive drilling tool includes a mounting sleeve, wherein the mounting sleeve has at least one substantially cylindrical internally threaded section having a length, L1, a thread entrance located towards an axial end and a thread exit located towards the axial inner wall. The threaded section has a thread form including crests, roots, contact flanks, and non-contact flanks, a pitch length, L4, located between two axially neighboring crests and an inner diameter, D2 disposed radially between the roots. A thread clearance section is positioned between the axial inner wall and the thread exit and has a length L2 and a diameter D1. A guiding section is positioned between the thread entrance and the axial end of the sleeve and has a length, L3. The pitch length, L4, is between 12.8-14.5 mm.

Abstract: A captive fastener having multiple components selectively biased to improve durability, including a primary body, an actuator, a plurality of locking pins, a biasing system, a bushing, and an actuator biasing member. Application of a predetermined force to an actuator proximal end longitudinally displaces the actuator from an actuator first position to an actuator second position and forces a cam leading edge against a biasing member to retract a pin from an extended position to a retracted position that does not interfere with a thread pattern formed in the fastener. The actuator biasing member returns the actuator to the actuator first position upon removal of the predetermined force allowing the biasing member to bias the pin away from the retracted position.

Abstract: To threadedly engage a bolt and a female screw with each other, thereby making it possible to shave off a deposit on the inner surface of the female screw and to make it easy for a worker to sense the seating, there is provided a bolt including a shaft 2 and a head, wherein a first thread 11 is provided on a head side of the shaft, and at least one of a thread provided larger in diameter than the first thread and a thread provided wider than the first thread is provided on a tip end side of the shaft.

Abstract: A nut-and-bolt fastener is provided. The nut and bolt are configured with a plurality of interlocking teeth that provide unidirectional travel of the nut with respect to the bolt. In particular, the configuration of the teeth arrest separation of the nut from the bolt while permitting the nut to move toward the head of the bolt into a fastened engagement. The teeth are non-helical and arranged concentrically around the longitudinal axis in evenly-spaced steps or segments along the longitudinal axis and around the shaft of the bolt and bore of the nut. Integral winged washers are provided on the bolt head as well as on the nut. Variations with different rake angles of the teeth as well as an expandable nut are also provided.

Abstract: A spring nut for attaching a threaded object to a structure can include first and second arms extending from the base, and a wedge element. The wedge element can be configured to selectively operatively urge the first and second arms apart to release the threaded object from between the first and second arms.

Abstract: Cable connector installation tools are provided. In one aspect, a tool includes removable nubs configured to set trim distances from the end of a cable to a blade in the tool. In another aspect, a tool includes jaws configured to force end connector components together, one of which being temporarily engaged by an interface nub.

Abstract: A spider is screwed to a drive shaft, includes a first screw that advances in one direction of an axial direction of the drive shaft when the spider rotates relative to the drive shaft in one direction of a circumferential direction, and is fastened to the drive shaft by the first screw. A nut is screwed to the drive shaft, includes a second screw that advances in the other direction of the axial direction of the drive shaft when the nut rotates relative to the drive shaft in one direction of the circumferential direction, and is fastened to the drive shaft by the second screw.

Abstract: A self-locking connection between the external thread of a bolt and the internal thread of a nut is established by providing at least one face of the internal and/or external thread with a self-locking portion which is adjacent the root of the respective thread. The self-locking portion has a first facet which makes with the central axis of the respective thread an angle of between 5.degree. and 30.degree., preferably an angle of between 8.degree. and 15.degree., and at least one additional facet which is adjacent the first facet and is inclined relative to the central axis at a greater second angle. The self-locking action is established in that the crest of the other thread is urged toward and is deformed against the self-locking portion of the at least one face in response to adequate axial stressing of the nut and/or the bolt. The polygonal peripheral surface of the nut has an odd number of sections not a single one of which is parallel to any other section.

Abstract: A self-locking connection between a bolt and a nut is obtained by making at least one face of at least one flight of the external thread of the bolt and/or the internal thread of the nut incongruous with the adjacent face of the other thread. This results in a clamping action along a helix at the root and/or at the crest of the other thread. The connection is self-locking in two directions if both faces of one or more flights of one of the threads are incongruous with the adjacent faces of the other thread.