If you’re a construction professional, then you know the importance of using the right fasteners for your projects. Using the wrong fastener for a job can lead to costly mistakes that could even cause damage. For example, using a screw that is too large can result in the material becoming loose over time or can even break off inside the hole. To avoid this, it’s important to understand the differences between screws and bolts.
Lag screws, also known as lag bolts, are some of the toughest construction fasteners on the market. They’re generally used to connect heavy lumber and other materials that will be bearing an intense load. They’re different from other common types of screws, like wood screws and sheet metal screws, in that they have a hex head and coarse threading.
The sizing for lag screws is determined by the diameter of the screw and the length of the section that enters the material. They are available in a range of sizes from 1/4-inch to 7/8-inch.
Like other screws, lag screws can be driven in place using a ratchet or a driver. However, they are usually installed by putting a washer under the head to distribute the clamping force over a larger area and to minimize compression of the material that the screw is being inserted into.
Lag screws are available in a variety of materials and finishes. Some are made from carbon steel while others feature a stainless steel finish. They can be rust-resistant, water resistant or oil-resistant, depending on the type of environment they will be used in. Lag screw sizes