A piercing nut according to the present invention includes an internal thread 11, a ring-shaped punching part 12, a ring-shaped groove 16, and a bearing surface 17. The internal thread 11 is formed at the center of a nut main body 10. The ring-shaped punching part 12 protrudes around the outer periphery of the internal thread 11. The ring-shaped groove 16 is formed around the outer periphery of the ring-shaped punching part 12. The bearing surface 17 protrudes around the outer periphery of the ring-shaped groove 16. The height h of the ring-shaped punching part 12 is equal to or lower than the height H of the bearing surface 17 in the opposite manner to the conventional technique.

A multi-material boss, configured for fastening of a fastener thereto, being a feature of a the cast part, comprising a boss cylinder, an augmenting cylinder, and a filler metal layer is provided. The boss cylinder is made of the same material as the die cast part having a first hardness, and has a first interior. The augmenting cylinder is made of an augmenting material having a second hardness, is fixedly secured in the first interior of the boss cylinder, and has a second interior defined by a second cylindrical shaped wall, a base rim, and a second opening. The second hardness is greater than the first hardness. The fastener is fastened to the multi-material boss via the second opening of the augmenting cylinder having the higher liquidus temperature and greater hardness.

A multi-material boss, configured for fastening of a fastener thereto, being a feature of a the cast part, comprising a boss cylinder, an augmenting cylinder, and a filler metal layer is provided. The boss cylinder is made of the same material as the die cast part having a first hardness, and has a first interior. The augmenting cylinder is made of an augmenting material having a second hardness, is fixedly secured in the first interior of the boss cylinder, and has a second interior defined by a second cylindrical shaped wall, a base rim, and a second opening. The second hardness is greater than the first hardness. The fastener is fastened to the multi-material boss via the second opening of the augmenting cylinder having the higher liquidus temperature and greater hardness.

A fastening element (10) comprising a screw (1) with a screw head (11) and a sleeve-shaped rivet arrangement (2) through which the screw (1) passes. Starting from the screw head, the rivet arrangement (2) has an installation spacer region (21), a deformation region (22) and a drive region (23) into which the screw is screwed. Seen from the drive region (23) to the screw head, the circumferential boundaries of the drive region (23) lie within the boundaries of the deformation region (22), the boundaries of the installation spacer region (21) protrude radially over the boundaries of the deformation region (22), and the boundaries of the screw head protrude radially over the boundaries of the installation spacer region (21). The installation spacer region (21) and the deformation region (22) are designed in such a manner that, as the screw is tightened, first of all plastic deformation of the deformation region (22) occurs.

A caulking bolt includes a shank and a head, wherein a bearing face of the head has, along an outer circumference of the shank, a groove having a ring shape into which a crimped member is fitted. The caulking bolt includes projections and depressions for whirl-stop in the groove.

A method and fastening device for use in heavy duty machinery for fastening a lining element to a surface of a body steel plate is disclosed. An assembly, a truck and a handling tool utilizing the method and fastening device is also disclosed.

A drain rod system for connecting at least two rods together and/or to a peripheral device, said rods and/or devices connected or coupled together by one or more connection means which including a first male portion at least part of which includes a non-circular member and a second female portion at least part of which is configured to receive at least part of the non-circular member extending from an adjacent male portion. The connection means further including first and second threaded engagement members, said first threaded member including a thread or threaded portion and at least part of the second threaded member adapted to receive at least part of the thread or threaded portion, wherein at least one or both of said threaded members includes a grip portion to enable the user to engage or disengage the male and female portions and/or the first and second threaded members by hand.

A method of manufacturing a member for fastening by joining a nut with a tubular joint portion extending from a main body formed with an internal thread to a panel with a mounting hole for the nut on an aluminum base material. The joint portion has a rotation-preventing portion with a concave and convex shaped outer peripheral surface and a guide portion extending from the rotation-preventing portion to one side. After the guide portion is inserted into the mounting hole, the nut is energized by electrodes in contact with both nut end surface sides. The nut then generates heat, and the periphery of the mounting hole is heated and softened. When the nut is pressurized with the electrodes, the rotation-preventing portion bites into the mounting hole, and the one end portion of the guide portion is swaged to become a retaining portion on one surface side of the panel.

A connector, which is configured to be anchored in a first object with thermoplastic material, defines a proximodistal axis and has a plate portion extending around the proximodistal axis and having a proximal face and a distal face, the proximal face being adapted for a tool to be pressed thereagainst. The connector further includes an attachment structure accessible from the proximal side of the plate portion and/or an interaction element having a sensor and/or actuator. An anchoring skirt protrudes distally from the plate portion and distally and radially outwardly, whereby an outer pocket open towards radially outwardly is formed between the distal face of the plate portion and a proximal face of the anchoring skirt, and an inner pocket open towards distally is formed radially inwardly of the anchoring skirt. The plate portion extends radially further than the anchoring skirt.

A multi-material boss, configured for fastening of a fastener thereto, being a feature of a die cast part, comprising a boss cylinder, an augmenting cylinder, and a filler metal layer is provided. The boss cylinder is made of the same material as the die cast part having a first hardness, and has a first interior. The augmenting cylinder is made of an augmenting material having a second hardness, is fixedly secured in the first interior of the boss cylinder, and has a second interior defined by a second cylindrical shaped wall, a base rim, and a second opening. The second hardness is greater than the first hardness. The fastener is fastened to the multi-material boss via the second opening of the augmenting cylinder having the higher liquidus temperature and greater hardness.