Coach Screws
(43 Products)Coach screws, also known as lag screws or lag bolts, are essential fasteners widely used in construction and woodworking. These screws are designed for heavy-duty applications where a secure hold is critical. Whether you're fixing metal to timber, concrete, or steel, coach screws provide reliable, long-lasting results. Coach screws are large screws designed to provide a strong, secure fixing in various materials such as wood, metal, and masonry. With a hexagonal or square head, these fasteners offer a tight, reliable hold for heavy loads. Available in a range of sizes and materials, coach screws are perfect for securing large structures or heavy items that require a much higher insertion torque than standard screws.
What Are Coach Screws?
A coach screw is a type of fastener used to join materials such as wood, steel, and masonry. Typically, coach screws have a thick, robust body with a square or hexagonal head designed to accommodate a wrench or drill for tightening. The screws feature a pointed tip, making it easier to penetrate materials like wood and metal. The thread design ensures the screw remains securely tightened, even under heavy loads.
Coach screws come in various lengths, diameters, and materials, such as stainless steel, carbon steel, and zinc-plated finishes, to suit different needs. We stock hexagon head coach screws in a range of different sizes.
Where Is a Coach Screw Used?
Coach screws are versatile fasteners used in several industries, particularly construction, woodworking, and metalworking. They are commonly used in the following applications:
- Wood and Metal: Ideal for metal-to-timber fixing, such as securing beams, brackets, and posts to wooden frames.
- Masonry and Concrete: Coach screws are used for anchoring heavy objects to concrete or masonry walls. They provide a secure hold even in tough surfaces.
- Heavy Loads: Their strong hold makes them suitable for use in structural applications where heavy-duty fastening is required, such as in furniture, decking, and construction.
- Outdoor Applications: Stainless steel coach screws are especially effective in outdoor environments, offering resistance to corrosion caused by weather conditions.
Coach Screw Benefits
- Strong Hold: The threaded shaft provides a tight, secure fixing that prevents loosening over time, even under heavy loads.
- High Insertion Torque: Coach screws have a much higher insertion torque than standard screws, making them ideal for securing large or heavy items.
- Durability: Stainless steel coach screws are resistant to corrosion, providing a long-lasting hold in outdoor and marine environments.
- Versatile Use: Available in a range of sizes, materials, and finishes, coach screws can be used for wood, metal, steel, concrete, and masonry.
- Ease of Installation: Designed with a pointed tip, coach screws can easily penetrate tough materials like timber and masonry. A pilot hole is often recommended for smoother installation and better results.
What Do M10, M6, and Other Numbers Mean on Coach Screws?
The "M" in coach screws like M10 or M6 refers to the metric size of the screw, specifically the diameter of the thread in millimetres. Here's what these numbers represent:
- M6 means the screw has a 6mm diameter.
- M10 means the screw has a 10mm diameter.
- The number following the "M" indicates the diameter of the screw, which helps you choose the right screw for your project.
For example, an M6 x 40mm coach screw has a 6mm diameter and is 40mm long. The diameter determines how thick the screw is, while the length specifies how far the screw will penetrate into the material. When selecting a coach screw, both the diameter (e.g., M6, M8, M10) and the length (e.g., 30mm, 40mm) are important to ensure you get the correct fit for your application.
For larger projects or heavier materials, a larger diameter screw (like M12 or M16) would be more suitable for a stronger hold.
Frequently Asked Coach Screws Questions
What Are Coach Screws Used For?
Coach screws are used for fixing heavy loads to wood, metal, concrete, and masonry. They provide a secure hold in a range of materials, especially where a high insertion torque is needed.
How Do I Choose the Right Size Coach Screw?
Choose the correct diameter and length for your specific application. The screw must penetrate deep enough to hold the materials securely. Use filters or a size chart to select the ideal coach screw for your project.
Can Coach Screws Be Used Outdoors?
Yes, coach screws, especially those made from stainless steel, are perfect for outdoor use. They provide excellent corrosion resistance and are ideal for applications exposed to the elements.
What Is the Difference Between Lag Bolts and Coach Screws?
While there are slight differences in terminology and head type, both lag bolts and coach screws serve the same purpose and are highly effective for heavy-duty fastening, especially in timber, steel, and concrete applications.
Do Coach Screws Need a Pilot Hole?
It is recommended to drill a pilot hole before inserting coach screws. The pilot hole helps the screw penetrate the material more easily and ensures a secure, tight fit.
What Materials Are Coach Screws Made From?
Coach screws can be made from stainless steel, carbon steel, or zinc-plated materials. Stainless steel coach screws are ideal for outdoor or corrosive environments, while carbon steel coach screws are perfect for heavy-duty use.
What Size Coach Screw Should I Use for Timber?
The size of the coach screw depends on the thickness of the timber and the weight of the load you are securing. Larger sizes are ideal for thicker materials and heavier loads.
What Is the Benefit of a Hexagonal or Square Head on Coach Screws?
Hexagonal or square heads provide better grip and torque during tightening, making it easier to secure the screw in place using a wrench or power tool.
Are Coach Screws Suitable for Metal Applications?
Yes, coach screws are ideal for metal-to-timber or metal-to-metal applications. They provide a secure hold, even in thick steel or other metal materials.
Can I Use Coach Screws for Concrete?
Yes, coach screws can be used for concrete or masonry, especially when paired with appropriate anchors or plugs. They offer a reliable hold for heavy-duty fastening.
