What’s an eyebolt?

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An eyebolt is a fastener with a circular end and a threaded end used to attach cables, ropes, wires, or chains to objects. They can be forged or welded and have different thread types for wood or metal. The size and material should be chosen based on the load and environment.

An eyebolt is a special type of fastener that is shaped like a lollipop. One end of the eyebolt resembles the threaded end of a screw, while the other side is forged into a circular shape. In a standard unit, the shank of the bolt is centered below the midpoint of the circle. Special eye bolts can also be offset or angled, so that the shank is on one side of the rim.

Typically, and eyebolt is used to attach a cable, rope, wire or chain to some other object. For example, these bolts can be driven into a ceiling or beam to support plumbing pipes and ducts. They can also hang a punching bag or flower pot from a ceiling or porch. An eyebolt installed in the floor can help support a suspended object and increase stability. Units can also be wall mounted to hang cords or ropes to support a painting.

Depending on the function and quality, the eyebolts have a forged or welded construction. In a forged bolt, the eye at the top is made by bending a piece of steel to form a ring that does not close completely. Welded bolts have a fully closed circular eye welded to a base or shank. Both can be used in a variety of applications, but welded bolts tend to be required for the more extreme installations.

The different types of threads on an eyebolt can help users distinguish between those designed for wood and those made for working with metal. Eyebolts, or eye bolts designed for wood, have very straight threads along the shank and a sharp point for biting into the wood. Sheet metal lags, or eye bolts for machines, feature thin threads spaced very close together to provide a strong grip into metal objects. Both wood and metal bolts can have a solid or partially threaded shank depending on the application.

When selecting an eyebolt, installers must find a unit that can safely support the required load. Generally, longer bolts and those with a thicker shank can support heavier weights. A large diameter eye can accommodate thicker items such as chains or heavy wires, while smaller diameter eyes can accommodate thin ropes and wires.

Many eye bolts are made from carbon steel, but like all steel items, these bolts can rust or corrode over time. Bolts used outdoors should be made of galvanized steel to resist rusting from rain and other forms of precipitation. Whether the eyebolt will be used around chemicals or in an industrial setting, stainless steel eyebolts will minimize the risk of corrosion and help the bolt hold up more effectively over time.

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