Methods and apparatus for preloading a bearing are provided. These methods and apparatus include preload monitoring devices whereby the mechanic can accurately monitor and regulate the preload on a bearing or bearing assembly. Aspects of the invention may also be used to adjust the endplay on a bearing or a bearing assembly. In one aspect, the preload on the bearing is transmitted through a housing having a fluid pressure that can be detected and monitored. An apparatus for precisely rotating a nut and a tool for precisely rotating a nut are also provided. A bearing retaining nut arrangement that permits the loading or evaluating of a bearing inner race is also provided. The bearing retaining nut arrangement includes a first load-setting nut, a lock washer, and a second jam nut that secures the arrangement to a shaft.

A coupling system for attaching a first part to a second part using a locator and expansion shear pin is disclosed. The first part has a first flange and may be a formed part, such as an intake manifold. The second part has a second flange and may be a component, such as a throttle body, for attachment to the first part. The component includes a fastener-passing bore having an inner diameter. The locator and expansion shear pin extends perpendicularly from the first flange. The pin includes an expansion wall extending beyond the surface of the flange. A fastener-receiving bore is formed concentrically in the pin relative to the wall. The wall is expandable from a first diameter to a second diameter. The first diameter is less than the inner diameter of the fastener-passing bore. The second diameter is at least equal to the inner diameter of the fastener-passing bore.

A coupling system for attaching a first part to a second part using a locator and expansion shear pin is disclosed. The first part has a first flange and may be a formed part, such as an intake manifold. The second part has a second flange and may be a component, such as a throttle body, for attachment to the first part. The component includes a fastener-passing bore having an inner diameter. The locator and expansion shear pin extends perpendicularly from the first flange. The pin includes an expansion wall extending beyond the surface of the flange. A fastener-receiving bore is formed concentrically in the pin relative to the wall. The wall is expandable from a first diameter to a second diameter. The first diameter is less than the inner diameter of the fastener-passing bore. The second diameter is at least equal to the inner diameter of the fastener-passing bore.

A fastener is disclosed. The fastener can be used to couple together two or more parts in an electronic device. The fastener may include a head coupled with a platform having a shaft extending from the platform. The head is coupled with the platform in a manner that allows the head to decouple from the platform. For example, the head is secured with the platform by an adhesive that provides an adhesive bonding force. In this regard, a rotational force applied to the head that is greater than the adhesive bonding force causes the head to decouple from the platform. The shaft may include several blades and several protrusions. The blades may be used to engage one of the parts. The protrusions may also engage the same part as the blades, and interlock with the part to provide a retaining force that prevents the fastener from decoupling from the parts.

Anchor fastening element for fastening an object to a wall having a drilled hole, which comprises a threaded bolt having a threaded portion at one end and an anchor portion at the other end and also having a shank portion in between. The threaded portion and the anchor portion have a low ductility and the shank portion has a higher ductility.

Anchor fastening element for fastening an object to a wall having a drilled hole, which comprises a threaded bolt having a threaded portion at one end and an anchor portion at the other end and also having a shank portion in between. The threaded portion and the anchor portion have a low ductility and the shank portion has a higher ductility.

Provided is a screw fastener provided with the function of a torque limiter which allows a high limit value to be set for the fastening torque without increasing the size thereof or the spring force of the spring member, and is easy to assemble and service. A multiple plate torque limiter is formed by a plurality of drive disk members (50) and a plurality of driven disk members (52) between a first member (10) and a second member (30), and the first member (10) and the second member (30) are detachably joined to each other by a retaining screw (22).

Provided is a screw fastener provided with the function of a torque limiter which allows a high limit value to be set for the fastening torque without increasing the size thereof or the spring force of the spring member, and is easy to assemble and service. A multiple plate torque limiter is formed by a plurality of drive disk members (50) and a plurality of driven disk members (52) between a first member (10) and a second member (30), and the first member (10) and the second member (30) are detachably joined to each other by a retaining screw (22).

An explosive bolt system includes an explosive bolt and an initiator device. The explosive bolt includes a shank having a first longitudinal end, an opposed second longitudinal end, and a longitudinal axis. The explosive bolt is configured for securing two elements together between the first longitudinal end and the second longitudinal end. The shank includes an internal chamber accommodating a first layer of a high density first secondary explosive material, and further accommodating a second layer of a low density second secondary explosive material in arming communication with the first layer. The initiator device is positioned with respect to the explosive bolt such that the initiator device is in arming communication with the explosive bolt.

A fastening system for attaching a cover to an underground vault having a bolt with course threads and a composite fiber reinforced polymer nut having a threaded portion extending through the nut which will fail in sheer before the nut and bolt seize. The fastening system can also include a nut retainer sized to allow the nut to float within the retainer.