Forgefix High Tensile Set Screw - M8 x 50mm - White - 10 Pack

High tensile refers to the material's ability to resist breaking under tension (pulling forces). It means these set screws are made from a stronger grade of steel, allowing them to handle higher loads and provide a more secure, durable fastening than standard screws.

M8 indicates that the screw has a nominal metric diameter of 8 millimeters. The '50' indicates the screw's length, which is 50 millimeters, measured from the underside of the head to the tip of the thread.

Zinc plating provides a protective layer over the steel, acting as a sacrificial coating that corrodes before the underlying steel. This significantly enhances the set screw's resistance to rust and corrosion, prolonging its life, especially in environments exposed to moisture.

Generally, high tensile set screws can be reused if they show no signs of damage, such as stretched threads, bent shafts, or stripped heads. However, for critical or safety-sensitive applications, it's often recommended to use new fasteners to ensure maximum integrity.

You will typically need a 13mm spanner or a 13mm socket wrench with a ratchet or driver to properly tighten an M8 hex head set screw. Ensure the tool fits snugly to prevent rounding the head.

Yes, due to their zinc plating, these high tensile set screws offer good corrosion resistance for outdoor applications. However, for extreme or marine environments, fasteners with more specialized coatings or materials (like stainless steel) might offer superior long-term protection.

First, ensure the nut or tapped hole is also M8 and that its thread pitch matches. Check for debris or damage in the threads of both the screw and the receiving part. Try cleaning the threads or using a thread tap/die if necessary. Do not force, as this can cause cross-threading.

Ensure you are using the correct size and type of wrench or socket (e.g., a tight-fitting 13mm socket for M8). Apply firm, even pressure directly along the axis of the screw, avoiding angled force. Replace worn tools. If stripping begins, stop, extract the screw if possible, and use a new one with correct tooling.

Re-tighten to the recommended torque specifications for your application. Consider using locking washers (spring, split, or serrated) or thread-locking fluid to prevent vibrational loosening. Ensure sufficient thread engagement (at least 1 to 1.5 times the screw diameter in the receiving material).

While zinc-plated, severe or prolonged exposure to harsh conditions (e.g., salt spray, certain chemicals) can eventually lead to corrosion. Ensure the zinc plating was not damaged during installation. For highly corrosive environments, consider a different fastener material or additional protective coatings/caps.