A system and method for creating a column for construction using bundled tube are provided. The column having a bottom portion, a middle portion, and a top portion. Each portion consists of a bundle of individual pillars, comprising a center pillar, a plurality of corner pillars, and a plurality of middle pillars. From the bottom portion of the column, addition pillars can be affixed on top of the pillars of the bottom portion, thus forming the middle and the top portion of the column. Each pillar can be secured to another component using a thread stepped dowel comprising of a base section, at least one middle section, and a tip section, with each section being progressively smaller in circumference than the last. The at least one middle section of the threaded stepped dowel further comprises thread spiraling around the outer surface of the at least one middle section.

A fastener having a head and a shaft extending from a first end at the head to a second end forming a tip. The shaft has a first threaded portion and a second threaded portion. The first threaded portion is disposed at the tip. A hardness of the first portion is higher than a hardness of the second threaded portion.

A fastener having a head and a shaft extending from a first end at the head to a second end forming a tip. The shaft has a first threaded portion and a second threaded portion. The first threaded portion is disposed at the tip. A hardness of the first portion is higher than a hardness of the second threaded portion.

Disclosed is an indicator assembly comprising a fastener defining a first end, a second end opposite the first end, and an axis extending from the first end to the second end; a first indicator positioned radially outwardly of the fastener relative to the axis of the fastener; and a second indicator positioned radially outwardly of the fastener relative to the axis of the fastener, wherein the second indicator is axially in between the first indicator and the second end of the fastener upon the fastener being oriented in a first position, and wherein the second indicator is radially inwardly or radially outwardly of the first indicator upon the fastener being oriented in a second position.

Disclosed is an indicator assembly comprising a fastener defining a first end, a second end opposite the first end, and an axis extending from the first end to the second end; a first indicator positioned radially outwardly of the fastener relative to the axis of the fastener; and a second indicator positioned radially outwardly of the fastener relative to the axis of the fastener, wherein the second indicator is axially in between the first indicator and the second end of the fastener upon the fastener being oriented in a first position, and wherein the second indicator is radially inwardly or radially outwardly of the first indicator upon the fastener being oriented in a second position.

A bolt for a battery includes a head in which at least a portion of a socket is formed, a threaded body including a threaded area in which a spiral thread is formed, and a reinforcing neck connected between the head and the threaded body and having a diameter increasing in a direction from the threaded body toward the head.

A bolt for a battery includes a head in which at least a portion of a socket is formed, a threaded body including a threaded area in which a spiral thread is formed, and a reinforcing neck connected between the head and the threaded body and having a diameter increasing in a direction from the threaded body toward the head.

A threaded connection including a pin with a plurality of pin threads, the plurality of threads comprising a plurality of pin crests and pin roots; and a box with a plurality of box threads, the box threads comprising a plurality of box crests and box roots, where the plurality of box roots and the plurality of pin crests are parallel to a horizontal axis, and where the plurality of pin roots are parallel to and collinear with a pin root taper plane, the pin root taper plane being not parallel to the horizontal axis creating at least one void space upon make-up of the threaded connection between the plurality of pin crests and the plurality of box roots, and at least one void space upon make-up between the plurality of pin roots and box crests.

The present invention includes a fastener comprising: a fastener body having a longitudinal axis and a first external male threaded portion, and two or more through-holes perpendicular to the longitudinal axis of the fastener body in the threaded portion.

The present invention includes a fastener comprising: a fastener body having a longitudinal axis and a first external male threaded portion, and two or more through-holes perpendicular to the longitudinal axis of the fastener body in the threaded portion.