A bolt extender includes a bottom portion defining internal threads and a multi-sided outer surface, an upper shoulder, and a threaded rod projecting upwardly from said upper shoulder.

A bolt extender includes a bottom portion defining internal threads and a multi-sided outer surface, an upper shoulder, and a threaded rod projecting upwardly from said upper shoulder.

A self-tightening fastening apparatus for vibrating work-parts includes a male fastener, a main female fastener, a locking female fastener, an anti-rotation female fastener, and a first compression body. The main female fastener is threadedly engaged around a first threaded-shaft section of the male fastener, wherein a head of the male fastener and the main female fastener compress the vibrating work-parts together. The locking female fastener is threadedly engaged around a second threaded-shaft section of the male fastener. The first compression body is compressed in between the main female fastener and the locking female fastener. The anti-rotation female fastener is threadedly engaged around a third threaded-shaft section of the male fastener.

A fastening element for retaining mechanical parts to each other at an opening extending through the mechanical parts.

Provided is a crimp securing structure of a bolt in which a crimp bolt 10 having a crimping recess 13 on the upper surface of the head is crimped onto a metal sheet 30. The thickness of a metal material press-fitted into the crimping recess 13 of the crimp bolt is made smaller at the peripheral edge of the crimping recess 13 and is made larger in the center portion thereof. In order to obtain this crimp securing structure, a crimping die 20 in which a stress-relief recess 23 is formed in a center portion of a convex portion is used to prevent the occurrence of excessive local stress in the crimping recess 13.

An interference fit joining method includes providing a tolerance adjuster and a die casting boss formed in a magnesium-based die casting. The method also includes positioning the tolerance adjuster over a cavity of the die casting boss. The method also includes pressing the tolerance adjuster at least partially into the cavity to form a joint assembly.

An exemplary door closer includes a body, a regulation screw, and an indicator. The body includes a surface and a cavity extending from the surface into the body, and the cavity includes an internal threading. The regulation screw is mounted in the cavity and includes an external threading engaged with the internal threading. The indicator is engaged with the regulation screw and positioned at least partially within the cavity. The indicator is positioned to project beyond the surface when the regulation screw is withdrawn to a reference position relative to the body.

A plug connector housing is provided having at least two oppositely arranged locking pins protruding from the outside, wherein each locking pin includes a metallic component which is overmolded at least in some regions with a plastic material.

A plug connector housing is provided having at least two oppositely arranged locking pins protruding from the outside, wherein each locking pin includes a metallic component which is overmolded at least in some regions with a plastic material.

It is known to use screws to fasten cladding to the structural timber framing of a building. A problem is that in an earthquake event, movement of the wall can cause the screws to bend and cause non-recoverable damage to the cladding and framing. This may adversely affect the ability of a building to absorb energy sufficient to resist the destructive forces that earthquakes bring to bear. The fasteners address this problem. The fastener has a head 2, a first shaft portion (a fuse) 4 and a second shaft portion (a shank) 5. The fuse extends between the head and the shank and has less resistance to bending than the shank.