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JP5190130B2 |
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JP5169770B2 |
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JP5155888B2 |
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JP2013044381A |
To provide a directional indication structure for a threaded body, which enables visual and tactile distinction to be made between a left-hand thread and a right-hand thread, and enables the rotation direction of the threaded body for fo...
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JP5146869B2 |
A steel of ultrafine structure having a ferrite structure of = 500 nm average crystal grain diameter is prepared by subjecting a steel material to warm working and further to cold working, thereby producing a steel excelling in strength ...
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JP5143407B2 |
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JP5143030B2 |
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JP5133885B2 |
A bolted joint which is formed by using a bolt having a tapered shoulder to cold form a deformable sleeve in order to provide a “zero-clearance” fit. Specifically, preferably a plurality of bolted joints are used to join a ring gear ...
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JP5133979B2 |
The invention provides a screw head having a hexalobular slot (2) in the upper surface of the screw head, an upper peripheral wall (9) of hexalobular planform extending down into the screw head, the upper peripheral wall (9) being parall...
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JP2013006247A |
To provide a loosening auxiliary device that facilitates loosening and removing a firmly fixed fastening member without depending on the size of the fastening member.The loosening auxiliary device 1A includes: a body 2A attached to a too...
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JP5113951B1 |
To provide a bolt and a nut capable of enhancing crime prevention. A head 1 has a torque receiving unit 2 for receiving rotational torque from a dedicated tool, and a torque receiving unit 2 has a curved outer surface to prevent the torq...
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JP5113956B1 |
To provide a bolt and a nut capable of enhancing crime prevention. A head 1 has a torque receiving unit 2 for receiving rotational torque from a dedicated tool, and a torque receiving unit 2 has a curved outer surface to prevent the torq...
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JP2013002629A |
To improve efficiency and robustness of screw driving work and to provide a screw that is hardly rusted by providing a set of a screw and a screwdriver having a structure where work can be performed using a single screwdriver even for sc...
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JP2012251654A |
To provide an anchor bolt which can be easily installed even if a worker cannot enter or insert the tip of a hand or finger into the back side of installation site.This easy-to-attach anchor bolt 1 is formed by integrating three parts, a...
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JP2012246985A |
To provide a removal prevention nut and a removal prevention bolt, which can prevent a grating cover, a manhole cover or the like from being stolen, which can be easily and inexpensively manufactured and which can be rapidly and easily c...
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JP5095594B2 |
To certainly move a screw member to a screw hole of a member to be fastened, a screw member 1 includes a male screw 2, and an inner peripheral face of the hole 4 has an engaging recessed part 5 to be engaged with an engaging projected pa...
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JP5091904B2 |
Recessed head fasteners are provided with a configuration by which the force applied by the blades of the driver to the recessed wings is applied at the radially outer regions of the wings. The wings of the fastener recess may be provide...
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JP2012220022A |
To prevent damages of surrounding roofing materials such as mounting screw holes for purpose of waterproof so as to prevent water leakage by adapting a receiving pedestal for panel materials such as solar panels to be equal to the gradie...
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JP5060582B2 |
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JP2012193836A |
To attain sharing of a fastening hexagonal wrench by forming the size of hexagonal holes of bolts with hexagonal holes whose bolt diameters are near to each other in the same size.In the bolts with hexagonal holes provided with hexagonal...
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JP2012183588A |
To provide a stud bolt enabling a torque test to be easily performed and capable of preventing generation of defective products as much as possible.In the stud bolt 10 used for capacitor stud welding, a male screw is formed on a bolt bod...
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JP5022294B2 |
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JP5021599B2 |
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JP2012167717A |
To provide a high-strength torshear type bolt which enables easy removal.In the high-strength torshear type bolt having a pin tail part 3, a head 1 has locking engagement parts 6. For instance, the locking engagement parts 6 is preferabl...
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JP2012159092A |
To provide a socket having a fitting hole into which a head of a hexagonal bolt or the like being a fastening member may be fitted, capable of reducing co-rotation between the hexagonal bolt and the socket even when the centers of the fi...
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JP2012154460A |
To temporarily hold a screw member for operation to an mounting member, simply, surely and still inexpensively.The screw member is constituted such that it is temporarily held with a mounting hole 21 formed in the mounting member, is scr...
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JP2012132553A |
To allow fastening to be performed easily as well while pressing in a shaft center direction.In an antitheft screw 1 in which a head 3 is provided at one end of a shaft part 2 formed with a male thread 2a and three locking parts 31 are f...
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JP3176444U |
To provide a screw member for preventing removal or loosening of a fastening member due to the purpose of theft or mischief. In a screw member having a screw, an engaging portion for an anti-rotating tool constituting a head of a nut or ...
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JP4956435B2 |
The fastener of this application is designed to facilitate the insertion of rotating power driven tools into the fastener recess. The recess of this fastener generally uses spirally configured driving surfaces and is formed in a counterb...
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JP3176207U |
To provide a screw member for preventing removal or loosening of a fastening member due to the purpose of theft or mischief, and a socket wrench for the screw member. A curved surface 15 and a flat surface 14 are alternately formed in th...
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JP3176256U |
To exert a washer effect on the head itself of a high-strength bolt, to make it possible to omit a washer and shorten the length under the neck of the bolt, and to increase the strength of the head and to hold it down when loosened. Prov...
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JP4944525B2 |
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JP3175390U |
To provide a lock nut having further improved anti-theft performance of a double lock nut. A nut main body 2 has a flange 12 on the outer periphery of an intermediate portion in the axial direction, and an engaging portion 13 for engagin...
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JP4929160B2 |
Interference surfaces are constructed on inner transition surfaces between wings of a fastener having a spiral recess. A portion of the transition surface is tapered to provide the interference. A standard driver for a spiral recess will...
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JP2012082855A |
To provide a chain tensioner easy to manage and capable of surely securing an air vent passage at the front end of a plunger.A screw hole 19 is formed in the front end of the plunger 13 which is slidably inserted into a cylinder chamber ...
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JP2012057772A |
To obtain a male screw which can improve detaching workability by preventing only a screw part from being left when a tightening torque is applied excessively.A first tool-engaging part 16 is provided in the upper end part 12A of the scr...
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JP2012057771A |
To obtain a male screw which can improve detaching workability of a threaded part left therein.A second tool-engaging part 18 is formed in the upper end part 12A of the screw part 12 of the male screw 10. The second tool-engaging part 18...
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JP3174138U |
To exert a washer effect on the head itself of a high-strength bolt, to make it possible to omit a washer and shorten the length under the neck of the bolt, and to increase the strength of the head and to hold down when loosened. A head ...
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JP4860725B2 |
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JP4855440B2 |
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JP3172020U |
To provide a guardrail bolt for preventing loosening and falling off of bolts and nuts, shortening construction time and reducing work load. The guardrail bolt 10 used for connecting and fixing a guardrail GR includes a head portion 11 a...
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JP4823692B2 |
A screw having stabilized strength, combination with a driver bit that best fits the screw, and a header punch for producing the screw. The screw having stabilized strength has letter Y-shaped bit-fitting grooves formed in the head porti...
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JP3171573U |
To provide a screw having a head shape in which a screw cannot be removed without a dedicated tool. A screw for fixing a material to be fixed to a fixing portion, the top surface of the screw head 11 has a single round hole 10 which is a...
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JP4804940B2 |
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JP4801837B2 |
A spiral drive system for threaded fasteners includes driver-engageable surfaces on the head end of the fastener in which at least some of the driver-engageable surfaces are defined by a spiral segment configured to maximize torque trans...
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JP2011196327A |
To provide a turbo compressor, a turbo refrigerator, and a method for manufacturing a turbo compressor, reducing a total length of a rotational shaft while a restriction part used for restricting rotation of the rotational shaft is provi...
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JP2011196542A |
To prevent wear and damage in the vertex of a nut or a bolt, and to prevent slipping of the nut or bolt in a socket during rotation.The anti-wearing nut or bolt has polygonal side surface parts on a head periphery of the nut or bolt; and...
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JP2011196472A |
To provide a lock bolt with the buckling function capable of holding a fastening state of high certainty, by preventing a sideslip of a fastening member by buckling a seat surface of a fastening object member.This lock bolt includes a bo...
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JP4773075B2 |
A plurality of mating splines (26) are located on an end of a tool for engaging the slots of the recess of a fastener. The splines are oriented to maximize torsional performance and to balance the shear strength of the pin with the shear...
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JP2011157695A |
To satisfactorily maintain looseness prevention of a fastener screwed to a mounting column of an outer mounting seat, for many years.This connecting structure of inner and outer mounting seats for a door handle includes: the outer mounti...
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