Hot Products
Heavy Duty Wood Screws from China Suppliers - Durable, Reliable Strength for Lasting Support from Our Factory
❓
Frequently Asked Questions
Q
What is a lag screw used for?
Lag screws are heavy-duty fasteners primarily used to connect large lumber pieces and secure heavy loads. They are commonly used in construction, decking, framing, and attaching structural components where a strong, reliable connection is required.
Q
What is the difference between a lag screw and a regular screw?
Lag screws are much larger and heavier than standard screws. They feature a hex head that requires a wrench or socket for installation, coarse threads designed to grip thick wood or masonry, and are built to handle significantly greater loads and shear forces than ordinary screws.
Q
Do I need to pre-drill a hole before installing a lag screw?
Yes, it is strongly recommended to pre-drill a pilot hole before driving a lag screw. This prevents the wood from splitting, reduces the torque required during installation, and ensures a more precise and secure connection. The pilot hole should be slightly smaller than the screw's shank diameter.
Q
What materials are lag screws typically made from?
Lag screws are most commonly manufactured from carbon steel, stainless steel, or galvanized steel. Stainless steel and hot-dip galvanized lag screws are preferred for outdoor or high-moisture environments due to their superior corrosion resistance.
Q
What sizes do lag screws come in?
Lag screws are available in a wide range of sizes. Diameters typically range from 1/4 inch to 1 inch (approximately 6mm to 25mm), and lengths can vary from 1 inch up to 6 inches or more, depending on the application requirements.
Q
Can lag screws be used in concrete or masonry?
Lag screws can be used in concrete or masonry when combined with appropriate lag screw shields or anchors. The anchor is first inserted into a pre-drilled hole in the concrete, and the lag screw is then driven into the anchor to create a secure, load-bearing connection.