Timco Self-Drilling Screws - Hex - Exterior Silver - 5.5 X 50

These screws are designed to drill through and fasten to steel up to a maximum thickness of 5.0mm.

No, the key feature of these screws is their self-drilling tip, which eliminates the need for pre-drilling in light section steel.

You will need a power drill or impact driver fitted with an 8mm socket.

They have an exterior plating tested to withstand 1,000 hours of salt spray and are suitable for urban and industrial areas with a low salt atmosphere (Corrosion Rating: 3).

They feature a 60° self-tapping thread.

These screws are specifically designed for steel substrates. Their self-drilling capability is optimized for light section steel and they are not recommended for wood or other materials.

This pack contains 120 pieces.

Ensure the steel substrate is within the 5.0mm maximum drilling thickness. Check that the drill RPM is within the recommended 1,000-1,800 range. Verify the screw tip is sharp and undamaged.

Ensure the 8mm socket is properly seated on the hex head. Reduce driving torque if possible, or use a drill with adjustable torque settings. Do not overtighten.

Confirm the screw is appropriate for the substrate thickness. Ensure the screw has fully engaged the thread within the steel. Check for any damage to the substrate or screw threads.

The exterior plating is rated for urban/industrial areas (Corrosion Rating: 3). If exposed to environments with higher salt content or constant moisture, consider a higher-rated fastener. Ensure no damage occurred to the plating during installation.