Screw SPAX BLAX 40 mm Steel 200 pcs

SPAX BLAX screws are 40 mm steel full-thread fasteners supplied in a pack of 200 pieces, designed for secure wood connections. They feature a flat countersunk head with a polygonal underside for flush seating, a 4CUT arrow-shaped tip that reduces splitting and lowers required driving torque, and the T-STAR plus hexalobular internal drive for high contact surface and precise force transmission between screwdriver and screw.

Advantages

The T-STAR plus drive provides optimal bit positioning and maximum, precise force transmission to minimise cam-out and enable fast, efficient series fastening. The flat countersunk head can be recessed without pre-drilling in many wood types thanks to its milling underside, leaving a flush finish appropriate for window and door frame installation. Full threading along most of the screw length increases tensile and compressive load transfer, making these screws suitable for heavy-duty wood connections. The 4CUT tip displaces wood fibres when inserted, reducing core expansion and the risk of splitting while lowering the required cordless screwdriver torque.

Suitable for

• Fastening window and door frames in plastic and aluminium profile systems
• Heavy-duty wood connections and structural timber joints
• Interior furniture assembly with dark or black fittings
• Applications where a flush countersunk finish is required

Key specifications

• Brand: SPAX
• Model: BLAX
• Length: 40 mm
• Thread length: 35 mm
• Head diameter: 7 mm
• Drive type: T-STAR plus (hexalobular internal)
• Tip: 4CUT arrow-shaped point
• Head type: Flat countersunk with polygonal underside
• Material: Steel
• Finish/color: Black
• Quantity: 200 pcs
• Suitable materials: Wood
• MPN: 1191040350403
• EAN: 4003530275692

How to use

Select a suitable T-STAR plus bit to match the hexalobular internal drive and use a cordless screwdriver or drill with the recommended torque setting for 40 mm steel screws. Position the screw perpendicular to the workpiece and start at low speed until the 4CUT tip creates the thread path. Increase speed and apply steady pressure until the flat countersunk head sits flush with the surface. In dense or very hard woods, consider reducing speed and checking torque to avoid overdriving.

Usage recommendations

Depending on the wood species and edge proximity, pre-drilling may still be necessary. For serial fastening, use compatible T-STAR plus bits and a charged battery to improve efficiency and reduce interruptions.