Screw SPAX BLAX 30 mm, steel wood screw, 200 pcs, T-STAR plus, Ø 4.5 mm, black

SPAX BLAX 30 mm screws are full-thread steel fasteners with a flat countersunk head and a T-STAR plus (hexalobular) drive. Designed for use in wood, these black screws combine a precise drive interface, an arrow-shaped 4CUT tip and a countersinking underside so they can be installed quickly and with minimal splitting. Supplied in a pack of 200, they are made in Germany and intended for general interior and structural wood fastening where a dark appearance is required.

Advantages

The T-STAR plus hexalobular drive increases contact area between bit and screw head, allowing optimal positioning and maximum force transmission to prevent bit cam-out. The full thread along the screw shaft increases tensile and compressive load capacity for reliable wood connections. The 4CUT arrow-shaped tip displaces wood fibres to reduce core expansion and minimise splitting, which also lowers the torque required from cordless drivers. The flat countersunk head has a polygonal underside that mills into the timber for flush seating without the need for pre-drilling in many cases.

Suitable for

• Fastening window and door frames in plastic and aluminium profiles when plug-free fixing is required
• Heavy-duty wood connections in structural timber applications
• Interior fixtures and decorative furniture where a dark or black screw appearance is desired

When it may not be suitable

If you need corrosion-resistant fasteners for exterior or high-moisture environments, plain steel BLAX screws without special coatings may not be appropriate. Also, in very hard or engineered materials where manufacturer guidance recommends pre-drilling, relying on the self-countersinking and 4CUT tip alone could lead to reduced performance or damage.

Key specifications

• Length: 30 mm
• Material: Steel
• Drive type: T-STAR plus (hexalobular internal)
• Head type: Flat countersunk with polygonal underside
• Thread: Full thread (along most or entire screw length)
• Tip geometry: 4CUT arrow-shaped point
• Colour/finish: Black
• Pack quantity: 200 pieces
• Suitable material: Wood

How to use

Select an appropriate T-STAR plus bit and secure it in a compatible screwdriver or cordless drill. For most soft and medium-density woods, the 4CUT tip and polygonal countersink underside allow direct insertion without pre-drilling; place the screw perpendicular to the workpiece and drive at steady speed until the flat head sits flush. For edge zones, hardwoods or when exact tolerances are required, consider a pilot hole or reduced drive speed to control entry and finish.

What to consider before purchase

• Intended environment: plain steel is not suitable for prolonged outdoor or corrosive conditions unless an appropriate coating is specified
• Material hardness: pre-drilling may still be required for very hard or engineered woods
• Appearance: black screws are chosen for dark woods or black fittings
• Drive compatibility: use T-STAR plus bits for optimal performance

Usage recommendations

Use a matched T-STAR plus bit and a fully charged cordless driver for fast, repeatable fastening. Reduce speed when entering edge areas or hardwoods and consider pilot holes only where manufacturer guidance or material density indicates it.