The Forgefix M8 x 200mm ZP Carriage Bolt & Nut pack is an essential fastening solution for builders, DIY enthusiasts, and manufacturers seeking secure, stable, and visually clean connections in wood or metal. Its unique square neck design prevents rotation during tightening, ensuring a robust joint, though proper pre-drilling and hole sizing are crucial for optimal installation.
Secure Fastening: M8 x 200mm size provides a substantial hold for heavy-duty applications in various construction and DIY projects.
Anti-Rotation Design: The square neck located directly under the round head embeds into the material, effectively preventing the bolt from spinning when the nut is tightened.
Corrosion Resistance: Features a Zinc Plated (ZP) finish, offering a protective layer against rust and oxidation, thereby extending the fastener's lifespan in both indoor and moderately exposed outdoor environments.
Smooth Head Finish: The dome-shaped, smooth round head presents a clean, low-profile appearance once installed, making it ideal for visible surfaces where aesthetics are important.
Versatile Application: Specifically designed for robust connections in both timber and metal structures, making it suitable for a wide range of projects from decking to machinery assembly.
Convenient Pack Size: Supplied in a bag containing 10 individual M8 x 200mm bolts and their corresponding nuts, providing ample fasteners for multiple tasks.
Strong, Stable Connection: The square neck feature ensures the bolt won't turn, creating a very secure and stable joint.
Corrosion-Resistant: Zinc plating offers good protection against rust and corrosion, extending the bolt's service life.
Aesthetically Pleasing: The smooth, round head provides a neat and flush finish, which is ideal for visible applications.
Versatile Use: Suitable for a broad spectrum of materials, including various types of wood and metal.
Complete Pack: Each purchase includes both bolts and nuts, saving time and ensuring compatibility.
Requires Precise Pre-drilling: For the square neck to engage correctly, a precise hole size is necessary.
No Drive on Head: The bolt head is smooth, meaning it cannot be driven or tightened from the head side; tightening is solely done via the nut.
Limited Corrosion Resistance: While zinc-plated, it may not be suitable for highly corrosive environments (e.g., marine applications) without additional protection.
Strong, Stable Connection: The square neck feature ensures the bolt won't turn, creating a very secure and stable joint.
Corrosion-Resistant: Zinc plating offers good protection against rust and corrosion, extending the bolt's service life.
Aesthetically Pleasing: The smooth, round head provides a neat and flush finish, which is ideal for visible applications.
Versatile Use: Suitable for a broad spectrum of materials, including various types of wood and metal.
Complete Pack: Each purchase includes both bolts and nuts, saving time and ensuring compatibility.
Requires Precise Pre-drilling: For the square neck to engage correctly, a precise hole size is necessary.
No Drive on Head: The bolt head is smooth, meaning it cannot be driven or tightened from the head side; tightening is solely done via the nut.
Limited Corrosion Resistance: While zinc-plated, it may not be suitable for highly corrosive environments (e.g., marine applications) without additional protection.
The Forgefix M8 x 200mm ZP Carriage Bolt & Nut is engineered for applications demanding a strong, stable, and clean finish. Its core strength lies in its anti-rotation design. When installed, the square neck bites into softer materials like wood or into a pre-punched square hole in metal, preventing the bolt from spinning while the nut is tightened. This is particularly useful in situations where access to the bolt head is restricted or where a flush, tamper-resistant finish is desired.
Common Applications Include:
Timber Construction: Ideal for securing decking frames, fence posts, pergolas, and outdoor furniture where a strong joint is needed and the smooth bolt head won't snag.
Playground Equipment: Its smooth head and secure fastening make it a safe choice for constructing or repairing children's play structures.
Automotive/Trailer Building: Can be used in chassis assembly or attaching components where vibration resistance is important and a low-profile head is beneficial.
Manufacturing & Assembly: Suitable for various industrial applications requiring robust, long-lasting connections.
The zinc plating (ZP) provides good corrosion resistance for fasteners used in damp environments, sheds, or moderately exposed outdoor settings. For optimal performance, ensure that the material thickness and the pre-drilled hole size allow the square neck to fully engage, preventing any spinning during installation.
Prepare Material: Identify the location for the fastening. If joining wood, ensure surfaces are flush. For metal, ensure any pre-punched square holes are aligned.
Pre-Drill: Using an appropriate drill bit (typically slightly larger than the bolt shank but smaller than the square neck's diagonal for wood, or matching the square hole for metal), drill a pilot hole through all materials to be joined. For the M8 bolt, an 8mm drill bit is generally suitable for the shank, but ensure the square neck can bite or fit snugly.
Insert Bolt: Push the carriage bolt through the prepared holes. Ensure the square neck is fully engaged in the material, preventing it from rotating.
Attach Nut: Place a washer (if desired, for increased bearing surface) and then the supplied M8 nut onto the threaded end of the bolt.
Tighten: Using a suitable wrench or spanner, tighten the nut until the connection is secure. The bolt head should remain stationary due to the square neck.
Material Compatibility: These M8 x 200mm bolts are highly effective in joining various types of wood (softwood, hardwood) and suitable metal sections. Always ensure the material's strength is appropriate for the M8 size.
Size: M8 indicates a nominal diameter of 8mm for the bolt's threaded portion, and 200mm is its length from under the head to the tip of the thread.
Environmental: Zinc plating offers moderate corrosion resistance, making these suitable for indoor and general outdoor use where they are not constantly exposed to harsh elements or corrosive chemicals.
Storage: Store bolts and nuts in a dry environment to preserve their zinc plating and prevent premature corrosion, even before use.
Inspection: Periodically check fastened joints, especially in outdoor applications, to ensure they remain tight. Re-tighten nuts if any loosening occurs.
Corrosion: While zinc-plated, direct, prolonged exposure to salt water or highly acidic/alkaline conditions can degrade the coating. For such environments, consider alternative materials or additional protective coatings.