Lag bolt

Lag Bolt

A Lag Bolt or lag screw is a type of fastener used in woodworking and construction industries. It is designed for securely connecting heavy lumber or other materials that bear an intense load.

Design and Function

The Lag Bolt is characterized by a large, hexagonal head and a coarse thread that covers a portion of the bolt. The design of the lag bolt is such that it can be driven into wood or other materials with the use of a wrench or a screwdriver. The coarse thread is designed to hold tightly into the receiving wood, providing a secure, tight connection.

Applications

Lag Bolts are commonly used in applications where heavy loads need to be secured. This includes the construction of decks, wooden bridges, and other heavy-duty structures. They are also used in the installation of heavy equipment, such as electrical utility poles and large machinery.

Types of Lag Bolts

There are several types of Lag Bolts, each designed for a specific application. These include:

• Stainless Steel Lag Bolts: These are used in applications where corrosion resistance is important. They are often used in outdoor applications, such as in the construction of decks and marine structures.

• Galvanized Lag Bolts: These are coated with a layer of zinc to provide corrosion resistance. They are commonly used in outdoor applications where they may be exposed to the elements.

• Structural Lag Bolts: These are designed for use in structural applications, such as in the construction of buildings and bridges. They are typically larger and stronger than other types of lag bolts.

Installation

Installation of a Lag Bolt involves drilling a pilot hole into the receiving material. The bolt is then driven into the hole using a wrench or a screwdriver. The size of the pilot hole is typically slightly smaller than the diameter of the bolt to ensure a tight fit.

See Also

• Screw
• Bolt
• Fastener
• Woodworking
• Construction

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