DIN 571 Stainless Steel 304 Hex Head Coach Screws, often referred to simply as coach screws or lag screws, are heavy-duty fasteners designed for robust connections in wood and other soft materials. Conforming to the DIN 571 standard, these screws feature a prominent hex head for easy driving with a wrench or socket, and deeply cut wood screw threads. The use of Stainless Steel 304 ensures excellent corrosion resistance and durability, making them suitable for demanding environments.

Key Features:

• Material: Stainless Steel 304 (A2): This austenitic stainless steel grade offers excellent corrosion resistance in a wide range of atmospheric and chemical environments. It is highly durable and resistant to rust, making it ideal for outdoor, marine, and corrosive industrial applications.
• DIN 571 Standard: Adheres to the Deutsches Institut für Normung (DIN) 571 specification, which defines the dimensions, tolerances, and mechanical properties of hex head coach screws. This ensures consistent quality and performance.
• Hex Head: Features a hexagonal head that allows for high torque application using a wrench or socket. This drive type provides a very secure grip for installation and removal, making it suitable for heavy-duty fastening where significant force is required.
• Coarse Wood Threads: Designed with deep, coarse threads that are optimized for cutting into wood fibers. These threads provide exceptional grip and resistance to pull-out, creating a strong and lasting connection.
• Pointed End: Typically has a gimlet or sharp point to facilitate initial penetration into the wood. Pre-drilling is almost always recommended for coach screws, especially in hardwoods, to prevent splitting and ensure proper engagement.
• Unthreaded Shank (Partial Thread): Many coach screws have a partial thread with an unthreaded shank near the head. This shank helps to pull the timber components tightly together without binding on the top piece of wood, enhancing clamping force.

Applications:

• Heavy Timber Construction: Indispensable for securing large wooden beams, posts, and heavy structural timbers in building frameworks, pergolas, and outdoor structures.
• Decking and Fencing: Excellent for attaching substantial deck ledger boards, fence posts, and railings where strong, weather-resistant connections are critical.
• Marine and Coastal Applications: Due to their 304 stainless steel construction, they are highly resistant to saltwater corrosion, making them ideal for boat docks, piers, and coastal construction.
• Garden Furniture and Landscaping: Used for assembling robust garden furniture, retaining walls, and other heavy-duty landscaping features that require durable, weather-proof fasteners.
• Gate Installation: Perfect for hanging heavy wooden gates and installing gate hardware securely.
• General Construction: Any application requiring a strong wood-to-wood or wood-to-masonry (with appropriate plugs/anchors) connection where high pull-out resistance is needed.

Advantages:

• Exceptional Corrosion Resistance: Stainless Steel 304 provides superior protection against rust and degradation in harsh outdoor and corrosive environments.
• High Strength and Load-Bearing Capacity: Designed for heavy-duty applications, offering excellent shear and pull-out resistance, making them highly reliable for structural connections.
• High Torque Application: The hex head allows for powerful driving with wrenches or sockets, ensuring very secure tightening.
• Durability and Longevity: Built to withstand significant stress and environmental exposure, ensuring a long service life.
• Secure Fastening: Deep wood threads create a very strong mechanical interlock with the timber.