Lag screws, also known as lag bolts, are heavy-duty fasteners used to create strong and long-lasting joints in wood, concrete, and heavy engineering applications. Unlike machine screws, lag screws are driven with a wrench or hex driver and do not require a pre-threaded hole — the thread cuts into the material to create its own secure hold. Hexagonal head for wrench tightening Sharp point for easy penetration Heavy-duty shank for high load-bearing capability Common Sizes: Dia: M6 to M20 (¼" to ¾") Length: 20mm to 300mm (1" to 12") (custom sizes available) Applications: Wooden structures & timber construction Heavy machinery mounting Solar panel mounting structures Industrial equipment installation Electrical & power infrastructure Furniture and building construction Concrete fastening with anchors