What is a lag screw?

A lag screw, also known as a lag bolt or coach screw, is a type of fastener with a hexagonal head and a sharp, pointed tip. It is typically used to securely attach two pieces of wood or metal together. Lag screws are designed to be driven into a pre-drilled pilot hole, providing a strong hold for heavy objects or structures.

Lag screws are available in a variety of sizes and lengths, with different thread types and materials to suit different applications. They are commonly used in construction, woodworking, and other heavy-duty projects where a strong and reliable connection is needed.

When using lag screws, it is important to choose the right size and length for the specific project, and to ensure that the pilot hole is drilled properly to prevent splitting or damage to the material being fastened. Additionally, using a washer with a lag screw can help distribute the load and provide additional strength.