Hex Head Screws
(50 Products)Hex Head Screws provide a high-torque fastening solution for heavy-duty timber-to-timber and timber-to-masonry applications. This range features professional-grade Timber Screws and traditional Coach Screws available in M6, M8, M10, and M12 diameters, ensuring robust structural integrity for framing, decking, and landscaping projects.
Understanding Hex Head Screws
Hex Head Screws are engineered for applications where standard recessed drive screws lack the necessary shear strength or torque capacity. The hexagonal head design allows for the use of sockets or wrenches, enabling significantly higher tightening force without the risk of cam-out or head stripping. This makes them the primary choice for structural connections in heavy joists, rafters, and railway sleeper installations where a secure, long-lasting fix is mandatory.
The selection includes modern Timber Screws, specifically designed for deep-penetration fastening with lengths reaching up to 300mm for thick-section timber. Alongside these are classic Coach Screws (also known as Lag Bolts), which feature heavy-duty shanks and aggressive threads designed to bite into wood to create a permanent, high-pressure bond. Both types are available in a spectrum of metric sizes, from the versatile M6 for light framing to the substantial M12 for primary structural members, providing a reliable mechanical fix for load-bearing assemblies.
Material Range
- Structural Timber Screws: High-performance fasteners designed for deep penetration in thick timber sections, available in lengths ranging from 75mm up to 300mm.
- Heavy-Duty Coach Screws: Traditional thick-gauge fasteners for maximum pull-out resistance in structural projects, available in M6, M8, M10, and M12 diameters.
Performance Benefits
- High Torque Transfer: The hexagonal drive system allows for the application of maximum mechanical leverage via power tools or hand wrenches.
- Structural Integrity: Heavy-gauge shanks provide superior shear resistance compared to standard wood screws, making them suitable for load-bearing joints.
- Pull-Out Resistance: Deep, wide-pitch threading ensures a secure grip in both softwood and hardwood grain.
- Durable Coatings: Finished to resist corrosion, ensuring the longevity of the connection in various internal and external environments.
Typical Applications
- Timber Framing: Securing primary beams, rafters, and floor joists where a high-strength mechanical fix is required.
- Landscaping: Building retaining walls, raised beds, and stairs using heavy timber sleepers.
- Decking Sub-Structures: Fastening ledger boards to host structures and connecting heavy-duty support posts.
- Masonry Anchoring: Using in conjunction with compatible nylon plugs for fixing heavy timber sections to brick or concrete.
Specification & Standards
- BS EN 14592: Timber structures - Dowel-type fasteners - Requirements.
- DIN 571: Standard specification for hexagonal head wood screws (Coach Screws).
- ISO 898-1: Mechanical properties of fasteners made of carbon steel and alloy steel.
Related Materials and Construction Uses
Hex Head Screws are often used alongside heavy-duty washers to increase the surface area of the head, preventing the fastener from pulling into the timber under high tension. In masonry applications, they are integrated with expansion plugs or chemical anchors. In structural carpentry, these screws work in tandem with galvanised joist hangers and framing connectors to ensure the completed assembly meets the load-bearing requirements of British Building Regulations.
Frequently Asked Hex Head Screws Questions
What Is The Difference Between Hex Head Screws And Hex Bolts?
Hex head screws are often fully or partially threaded and may be installed directly into tapped holes or substrates. Hex bolts are typically used with nuts and washers in through-bolted connections requiring pre-drilled clearance holes.
What Drive Tools Are Required For Installation?
Installation requires a compatible spanner, socket wrench, or impact driver with hex socket attachment. Correct tool sizing is essential to prevent rounding of the head and to achieve specified torque values.
Can Hex Head Screws Be Used Outdoors?
Yes, provided the material or coating is appropriate for the exposure class. For external construction, hot-dip galvanised or stainless steel screws are commonly specified to reduce corrosion risk.
