SPAX T-Star Plus T20 Universal Screws 3.5 x 30mm Black Metallic Coated - Pack of 200

You will need a T20 bit for the T-STAR Plus drive.

In most wood applications, pre-drilling is not required due to the 4CUT point. However, for very hard woods or near edges, a pilot hole can be beneficial.

These screws are primarily designed for use in wood.

The 4CUT point has four cutting edges that displace wood fibers, creating space for the screw and minimizing the risk of splitting the wood.

The black metallic coating provides durable protection against corrosion and offers a professional, finished appearance.

The black metallic coating offers good corrosion resistance, making them suitable for many general applications. For prolonged exposure to harsh outdoor elements, specific exterior-grade fasteners may be more appropriate.

The T-STAR Plus drive provides a much more secure connection with the bit, significantly reducing cam-out (bit slippage) and allowing for better torque transfer, leading to faster and more efficient driving.

Ensure you are using a T20 bit and that it is fully engaged. Check if the wood is excessively hard; a pilot hole may be necessary. Verify that the screw's tip is not damaged.

While designed to minimize splitting, ensure the 4CUT point is properly aligned. For very brittle or thin wood, a pilot hole is recommended. Avoid over-tightening.

Confirm you are using a T20 bit and that it is in good condition. Apply firm, consistent pressure directly into the screw head. Ensure the screw is driven straight.

The countersinking feature requires the material to mill correctly. Ensure the head is driven straight into the material. For extremely hard surfaces, a slightly larger pilot hole for the head might be needed, or manual countersinking before driving.