The word “bolt” describes a threaded fastener that has external threads. These threaded fasteners are designed to be assembled with a nut. Some of the most popular bolt head designs are the #7 head bucket tooth bolts, heavy hex, #3 head plow bolts, tap bolts, which are fully threaded hex bolts, and square head bolts. Heavy hex head bolts are large bolts with a hexagonal head and are fully threaded.
Some facts about the screw, nut and bolt industry, including heavy hex head bolts:
* There are approximately four thousand screw, nut and bolt manufacturers in the United States, including heavy hex head bolts.
* The screw, nut, and bolt industry in the United States employs 118,998 people.
* In the United States, the first handheld screwdriver appeared in the 1800s.
* Most screws are tightened in a clockwise rotation.
* Nuts are usually opposite a mating bolt, like heavy hex head bolts, in order to fasten a stack of parts together.
* Early screws were made out of wood and were used to hold wine presses and olive oil presses together as well as pressing clothes.
* Lag screws are sometimes called lag bolts. They are referred to as large wood screws.
* Drive screws are considered include planes wrapped around a post.
* The pitch of a screw usually refers to the degree of the thread, or the inclined plane, and is specified by the number.
* Screw sizes are indicated by numbers. The higher the number then the wider and thicker the screw and the smaller the number the smaller width and thinner the bolt. To see more, read this: www.bigbolts.com