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This guide is for engineers, builders, and DIY enthusiasts who require robust and reliable fastening solutions. The Unifix ISO 4017 8.8 BZP Set offers superior strength and durability for high-tensile applications, ensuring secure connections in demanding environments. While it provides a complete and convenient fastening package, users should verify thread compatibility for specific project needs.
| Colour | Silver |
|---|---|
| Model Part Number | ISO 4017 |
| Brand | Unifix |
'8.8' refers to the material property class of the steel, indicating its high tensile strength (800 MPa minimum tensile strength) and yield strength (approximately 80% of tensile strength).
BZP (Bright Zinc Plating) offers good corrosion resistance for general indoor and protected outdoor applications. For harsh environments (e.g., coastal areas, high humidity, industrial pollution), a more robust coating like hot-dip galvanizing or stainless steel may be required.
ISO 4017 specifies the dimensional and mechanical properties of metric hexagon head bolts with standard lengths and thread lengths. It ensures consistency and interchangeability with other fasteners adhering to the same standard.
Yes, these bolts are suitable for use in treated lumber for structural applications. Ensure the lumber is adequately dried after treatment if necessary and that the connection is designed to accommodate the forces involved.
For an M16 8.8 bolt, a common snug torque is around 175-200 Nm, and a proof load torque is approximately 250-280 Nm. However, always consult engineering specifications for your specific application as factors like clamped material can influence the ideal torque.
Yes, the accompanying washers are designed to be compatible with M16 bolts, providing a larger surface area to distribute the load and protect the fastened material.
Buying in bulk (like a box of 100) is typically more cost-effective per unit for projects requiring a significant number of fasteners, ensuring you have a sufficient supply without needing to reorder frequently.
Ensure you are using the correct M16 nut and that both threads are clean and free from debris or damage. Verify that the nut is not cross-threaded.
Check for thread damage on both the bolt and the nut. Ensure the washer is correctly seated and not obstructing the nut's movement. Use a suitable wrench for adequate leverage.
Clean the affected area with a soft cloth. For minor surface rust, a mild abrasive cleaner might be used cautiously. Consider applying a clear sealant for added protection in damp environments.
This usually occurs from over-tightening or using an ill-fitting wrench. Replace the damaged fastener. Use the correct size wrench and tighten to appropriate torque specifications to prevent recurrence.
Setup: These fasteners are designed for straightforward installation. Ensure the bolt threads align correctly with the nut threads. Use appropriate wrenches or spanners to tighten the nut securely against the washer and the surface being fastened. For optimal performance, tighten to the recommended torque specifications for M16 bolts of 8.8 grade, considering the materials being joined.
Compatibility: The ISO 4017 standard ensures precise dimensions, making these fasteners compatible with standard M16 nuts and M16-sized holes. Always ensure the materials being joined are capable of withstanding the clamping force generated by these high-tensile bolts.
Care: While the BZP coating provides corrosion resistance, periodic inspection is recommended, especially in exposed environments. If surface rust appears, it can be gently cleaned. For prolonged outdoor use or in corrosive environments, consider applying a protective coating or using stainless steel alternatives.
