A bolt which can prevent seizure is provided due to the bolt being installed obliquely. A guide portion is formed between a groove portion formed at a distal end portion of the threaded portion and a surface end position on a base end side of the tapered surface, a starting end portion of the guide portion being an intersection between the surface end position on the base end side of the tapered surface and a helix according to the groove portion, a terminal end portion of the guide portion overlaps with the distal end portion of the threaded portion, an angle in the direction around the axis of the bolt from the starting end portion to the terminal end portion is set in the range of 90 to 360.

A bolt which can prevent seizure is provided due to the bolt being installed obliquely. A guide portion is formed between a groove portion formed at a distal end portion of the threaded portion and a surface end position on a base end side of the tapered surface, a starting end portion of the guide portion being an intersection between the surface end position on the base end side of the tapered surface and a helix according to the groove portion, a terminal end portion of the guide portion overlaps with the distal end portion of the threaded portion, an angle in the direction around the axis of the bolt from the starting end portion to the terminal end portion is set in the range of 90 to 360.

An anchor bolt assembly and arrangement for anchoring structure or equipment of an air separation plant to a reinforced concrete foundation is provided. The anchor bolt assembly includes one, two or more anchor bolts, each anchor bolt having a first end configured to be embedded in the concrete foundation and a threaded second end configured to be projecting from the foundation. The anchor bolt assembly further comprises a steel plate affixed to the first end of the anchor bolt(s) and extends in an orthogonal orientation to the length of the anchor bolts. The size of the steel plate is selected such that a perimeter of the steel plate is between about 0.25 and 4.0 times the embedment depth of the anchor bolt body which provides additional pull-out strength of the anchor bolt assembly. Preferably, the steel plate is disposed below to the bottom longitudinal reinforcement within the concrete foundation.

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.

A fastener system attaches a connector or other upper member to a lower structural member such as a post or beam. The fastener systems consists of a fastener having an extending shank that is driven into a lower structural member and the fastener is received by a washer that also has an extending tube, and the extending tube of the washer is received by the connector or upper member.

A fastener system attaches a connector or other upper member to a lower structural member such as a post or beam. The fastener systems consists of a fastener having an extending shank that is driven into a lower structural member and the fastener is received by a washer that also has an extending tube, and the extending tube of the washer is received by the connector or upper member.

A locator bushing is used in combination with a receiving member, such as a fixture plate. The locator bushing is a single integral item having a driver portion and a threaded portion to locate and position devices in relation to the receiving member. The driver portion includes a first locating surface and a drive element. The first locating surface locates the locator bushing in the receiving member. The drive element is configured to receive a rotational force to rotate the driver portion. The threaded portion releasably engages the receiving member and is used to position the locator assembly within the receiving member. The driver portion includes a second locating surface to selectively locate and position an insert device relative to both the locator assembly and the receiving member.

A locator bushing is used in combination with a receiving member, such as a fixture plate. The locator bushing is a single integral item having a driver portion and a threaded portion to locate and position devices in relation to the receiving member. The driver portion includes a first locating surface and a drive element. The first locating surface locates the locator bushing in the receiving member. The drive element is configured to receive a rotational force to rotate the driver portion. The threaded portion releasably engages the receiving member and is used to position the locator assembly within the receiving member. The driver portion includes a second locating surface to selectively locate and position an insert device relative to both the locator assembly and the receiving member.

A fastening mechanism used to connect or fasten a component to a structure or frame. The mechanism includes first and second complementary fastening members. A spring element extends between the first fastening member and the component. The first fastening member including a protruding frictional connection support portion including a bearing face or surface contacting or engaging the structure or frame. The bearing face is radially spaced from a body of the first fastening member.

A fastening mechanism used to connect or fasten a component to a structure or frame. The mechanism includes first and second complementary fastening members. A spring element extends between the first fastening member and the component. The first fastening member including a protruding frictional connection support portion including a bearing face or surface contacting or engaging the structure or frame. The bearing face is radially spaced from a body of the first fastening member.