FAQs For Infrastructure Construction Bolts

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Top Questions And Answers For Hex Bolts

What Tool Is Used With A Hex Bolt?

A variety of tools can be used in the installation and adjustment of hex bolts. A wrench or ratchet is most commonly used when tightening or loosening bolts with a hexagonal head. Grips and other tools can also be used provided they fit with the head shape. Lighter-duty bolts can be turned by hand, while heavy-duty structural bolts will require electric tools.

What is the difference between a hex bolt and a hex cap screw?

The main differences between a hex bolt and a hex cap screw are in their structure. Hex cap screws have tighter tolerances in their body dimensions. Their end is chamfered. They also have a washer face below the head, which helps to distribute load once the screw is installed in place. Hex bolts are similar but they have a flat end. The head of these bolts does not have a washer face.

What is a hex bolt?

Hex bolts are fastening components that are used in various structural applications. They have a hexagonal head shape and machine threads on a flat-ended rod. They are often paired with a nut and washer to form a fastener assembly. They can also be installed directly into a tapped hole. Hex cap screws and machine bolts are other ways of referring to hex bolts.

What are the advantages of hex bolts?

Hex bolts offer many advantages. Because of their hexagonal head, they can be gripped from all angles and tightened and loosened, even by hand. This feature also allows a hex bolt to be accessed from all directions and installed using various tools. Their versatility and toughness enable them to be used in many structures.

What are hex bolts used for?

Hex bolts are used for facilitating connections between wood, steel, and other types of structural materials. These threaded fasteners are used in the construction of buildings and infrastructure. Some applications are docks, bridges, and highways. A hex bolt with a forged head may also be used as a headed anchor bolt, which is effective for fastening various hardware directly to concrete.

What are hex bolts made from?

When made for structural applications, hex bolts are formed from tough, construction-grade materials like carbon steel and similar alloys. They may be finished with resistance enhancing treatments like zinc-coating and hot-dipped galvanization. When made for use in light-duty applications, hex bolts are made from a broader range of materials, including rigid polymers like nylon.

What are heavy hex bolts?

Heavy hex bolts are fasteners used in structural applications where steel must be connected to steel. They are mainly used for attaching heavy parts in construction applications. Heavy hex bolts that meet with ASTM specifications are identified as A325 and A490. These bolts have a diameter range of 1/2-inch to 1 1/2-inch with thread lengths that are shorter than standard hex bolts.

How are hex bolts measured?

Hex bolts are measured by their diameter and their length. The diameter indicates the thickness across the bolt’s shaft, while the length measurement is taken from the base of the bolt’s head to the end of the shaft. When determining the right size of hex bolt, the width of the hole in the part or installation surface should be measured, along with the depth of the installation or connection.

Are hex bolts fully threaded?

Hex bolts aren’t always fully threaded. Typically, the fully threaded variety is used when heavy duty-holding is required. Partially threaded hex bolts are widely available. This type had a smooth portion that extends from the bolt’s neck and usually runs half the length of the shaft. Partially threaded hex bolts perform better where alignment and shear resistance is needed.

What does a hex head bolt look like?

Hex head bolts can be identified by their hexagonal head shape. The head is flat on the top. The shaft of these bolts may be fully or partially threaded. When partially threaded, they have a smooth neck below the head. The threaded shaft has a flat end that will accommodate a hexagonal nut or anchor.