Unifix Hexagonal Bolt - M16 x 60

Grade 8.8 HT refers to the bolt's mechanical properties. '8.8' indicates its tensile strength (800 N/mm²) and yield strength. 'HT' stands for High Tensile, meaning it's designed for applications requiring high strength.

BZP stands for Bright Zinc Plated. It's a common surface treatment that provides a layer of zinc for corrosion resistance and a bright, aesthetically pleasing finish. The CR3+ standard indicates a modern, environmentally friendlier passivation process.

Yes, the BZP finish provides good corrosion resistance suitable for many outdoor applications. However, for prolonged exposure in highly aggressive environments (e.g., coastal areas, high humidity), additional protection or stainless steel alternatives might be more suitable.

You will need a standard wrench or socket set. For an M16 hex head bolt, a 24mm tool is typically required.

Yes, as they are made of steel and zinc plated, they are magnetic.

An M16 bolt generally has a standard coarse thread pitch of 2.0mm. However, fine thread variants exist, but DIN 931 typically implies a standard coarse thread unless otherwise specified.

Ensure you are using the correct size socket or wrench (24mm for M16). Apply steady, even pressure. If the head is already damaged, replace the bolt and use a higher quality tool for the replacement.

Check that the bolt and the receiving thread (nut or tapped hole) are clean and free from debris or damage. Ensure you are starting the thread straight and not cross-threading. Verify that the thread is indeed M16.

While BZP offers resistance, it is not impervious. Minor surface rust can often be removed with a soft cloth. For significant corrosion, consider replacing the bolt with one suited for the specific environmental conditions, possibly stainless steel or a more robust coating.