Screw SPAX BLAX 40 mm Steel 200 pcs

SPAX BLAX 40 mm screws are steel wood screws with a full thread and a flat countersunk head. The 40 mm length, 35 mm thread length and 8 mm head diameter make them suitable for a range of woodworking and frame-installation tasks. The screws feature the T-STAR plus hexalobular internal drive for optimal bit engagement and efficient force transmission, and a 4CUT arrow-shaped tip that reduces splitting and often eliminates the need for pre-drilling. This pack contains 200 screws and is made in Germany.

Advantages

The T-STAR plus drive increases contact surface and ensures precise positioning of the bit in the screw head, reducing bit slips and enabling fast, efficient fastening. The flat countersunk head with a polygonal underside mills into the wood so it can be recessed flush without separate countersinking in many cases. Full threading along the screw length improves tensile and compressive load transfer for robust wood connections. The 4CUT tip displaces wood fibres to create space for the core diameter, reducing splitting and lowering the torque required from a cordless screwdriver.

Suitable for

• Fixing window and door frames in plastic or aluminium profiles
• Structural and heavy-duty wood connections
• Furniture assembly and decorative furniture with dark or antique woods
• Interior woodwork where a black screw finish is preferred

Key specifications

• Length: 40 mm
• Thread length: 35 mm
• Head diameter: 8 mm
• Drive type: T-STAR plus (hexalobular internal)
• Tip: 4CUT arrow-shaped tip
• Head shape: Flat countersunk with polygonal underside
• Material: Steel
• Finish/colour: Black
• Quantity: 200 pcs
• Suitable material: Wood
• Origin: Germany

How to use

Select a T-STAR plus bit that matches the screw head and fit it into a cordless or corded screwdriver. Position the screw at the required location and apply steady pressure while driving at moderate speed so the 4CUT tip can displace fibres cleanly. For frame installations, ensure the flat countersunk head sits flush in the profile or wood surface. Pre-drill only when working with very hard or brittle timbers or where the manufacturer’s guidance indicates.

Usage recommendations

Use the screws with a matched T-STAR plus bit to avoid cam-out. In areas prone to splitting, the 4CUT tip often allows omission of pre-drilling, but test on a scrap piece if in doubt. Choose screw length appropriate to the workpiece thickness to ensure secure fixing without protrusion.