Prox Wood Construction Screw 4x40 mm TX20 Countersunk Partial Thread 500 pcs

The Prox Wood Construction Screw measuring 4x40 mm with a 25 mm partial thread is engineered for reliable and stable assembly in various woodworking and building applications. Featuring a countersunk head and a TX20 Torx drive, this fastener is designed to provide a clean, flush surface finish while ensuring efficient torque transfer during installation. Certified according to EN 14592, these screws meet established standards for structural timber products, making them a dependable choice for professional tradespeople and DIY enthusiasts alike.

Advantages

These wood construction screws are specifically designed to minimize the risk of wood splitting during installation, preserving the integrity of your materials. The partial thread design ensures that joined wooden elements are pulled tightly together for a secure and stable connection. The countersunk head allows the screw to sink flush with the wood surface without requiring complex countersinking prep work. Furthermore, the TX20 Torx drive system enables high torque transmission while significantly reducing the likelihood of bit slippage, which helps protect both the screw head and the driving tool.

Suitable for

• Assembly of wooden structures and frames
• General carpentry and woodworking projects
• Installing timber boards and panels
• Professional construction and renovation work

When it may not be suitable

These screws are not recommended for use in non-wooden substrates such as concrete, brick, or metal without appropriate anchors. Additionally, un-coated standard steel screws may not be suitable for highly corrosive environments or outdoor applications involving treated woods prone to accelerated metal degradation unless specifically rated for such exposure.

Key specifications

• Dimensions: 4 mm diameter by 40 mm length
• Thread type: Partial thread with a 25 mm thread length
• Head type: Countersunk head
• Drive type: TX20 Torx
• Packaging quantity: 500 pieces per pack
• Standard compliance: EN 14592

How to use

Select a suitable power drill or screwdriver equipped with a TX20 bit. Position the wooden elements to be joined and align them correctly. Place the screw perpendicular to the wood surface and drive it in at a steady speed. The partial thread will pull the top wooden component tightly against the base material as the countersunk head seats itself flush with or slightly below the surface of the wood. Avoid overtightening to prevent stripping the wood fibers or damaging the screw drive.

What to consider before purchase

• Verify that the 4x40 mm dimensions and 25 mm thread length are appropriate for the thickness of the wood you plan to fasten.
• Ensure you have a compatible TX20 screwdriver bit available for installation.
• Check if the project environment requires specialized corrosion-resistant fasteners.
• Confirm the pack size of 500 pieces aligns with the volume required for your specific task.

For optimal results, always pre-drill pilot holes when working near the edges of hard or dense timber to prevent splitting, and ensure the driver bit is fully engaged in the TX20 recess before applying torque.