Screw SPAX BLAX 25 mm Steel 200 pcs

SPAX BLAX 25 mm screws are steel fasteners designed for wood applications. Each screw is 25 mm long with a thread length of 21 mm and a head diameter of 8 mm. The screws feature a flat countersunk head with a polygonal underside, a full thread along most of the shaft, a 4CUT arrow-shaped tip, and a T-STAR plus hexalobular internal drive. This 200-piece pack is manufactured in Germany and intended for reliable, plug-free fastening of wooden components and for use with dark or black fittings.

Advantages

The T-STAR plus drive provides a larger contact surface and optimal bit positioning to enable maximum force transmission from the screwdriver to the screw, reducing cam-out and making fastening faster and more efficient. The flat countersunk head can be milled into the wood without pre-drilling in many cases and sits flush with the surface. Full threading increases the tensile and compressive forces the screw can transfer, improving load-bearing connections. The 4CUT tip displaces wood fibres to reduce splitting and lowers required driving torque, often eliminating the need for pre-drilling.

Suitable for

• Installation of window and door frames with plastic or aluminium profiles
• Heavy-duty wood connections in structural carpentry
• Fixing decorative furniture or dark/antique woods and dark metal fittings
• Interior woodworking tasks where flush countersinking is required

Key specifications

• Length: 25 mm
• Thread length: 21 mm
• Head diameter: 8 mm
• Drive type: T-STAR plus (hexalobular internal)
• Tip: 4CUT arrow-shaped point
• Head style: Flat countersunk with polygonal underside
• Material: Steel
• Colour: Black
• Pack quantity: 200 pcs
• Suitable material: Wood
• Manufacturer origin: Germany

How to use

Select a T-STAR plus bit that matches the screw head and fit it to a cordless screwdriver or drill. Position the screw perpendicular to the workpiece and apply steady pressure while driving at moderate speed. For many common wood types and edge positions the 4CUT tip and the polygonal underside of the flat countersunk head allow direct countersinking without pre-drilling; for very hard or brittle woods, pre-drilling a pilot hole is still recommended. Use full-thread screws where high tensile and compressive load transfer is required.

Usage recommendations

For best results, use a correctly sized T-STAR plus bit, maintain consistent driving pressure to avoid cam-out, and check wood density before skipping pre-drilling. Store screws in a dry place to preserve the black coating and corrosion protection.