Lag Bolts

Lag Bolts, more correctly known as Lag Screws because they have a wood type screw thread, a point, and do not require a nut or threaded insert for tightening purposes, usually have a larger diameter than regular wood screws. They are intended for use in lumber or other heavy materials that are bearing an heavy load. Since they are designed for heavy-duty applications, they require a pre-drilled hole, and usually have a hex head. In the U.K., these are knows as Coach Screws.

Lag Screws, sometimes called Lag Bolts, usually require a pre-drilled hole. They are usually larger diameter, with a wood-style thread, and are used to connect wood or like materials that need to bear a heavy load.Lag bolts are heavy-duty square or hexagonal head bolts used in woodworking applications. They are designed to support much heavier loads than wood screws or construction screws They have coarse threads and tapered points that allow them to support a lot of torque. Lag screws can be installed using a wrench or nut driver. The name is misused these days to refer to square drive wafer head deck screws.
Common applications of Lag Bolts are:

• • Lumber
• • Heavy Duty Construction
• • Wooden Playground Equipment
• • Bridges
• • Railroads

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