Fixing and buying guide
A601501 Ulti-mate II Professional Woodscrew PoziSquare Double Csk Z&Y - (12g) 6mm X 150mm - 50
What makes this screw different
The PoziSquare recess is a state-of-the-art design that resists camout, ensuring the driver stays centred and engaged throughout the drive cycle. The recess is self-centering and compatible with both PH (Phillips) and PZ (Pozidriv) drivers, giving you flexibility on site. The quick start point allows rapid starting with minimum force, reducing operator fatigue and improving consistency. The slotted shank reduces wood splitting by relieving pressure as the screw enters timber.
- PoziSquare and acro anti-camout recess for stick-fit and stable driving
- Self-centering recess works with PH and PZ drivers
- Quick start point for rapid engagement
- Slotted shank minimises wood splitting
Head design and countersinking
The reinforced double angle head is engineered to self countersink into timber without requiring pre-drilling or countersinking in most applications. This design also provides resistance to screw breakage under load, critical for structural work and high-stress applications. The absence of ribs on this size makes it ideal for use with hinges, latches, and other hardware fittings where a clean head profile is essential.
- Double angle head self countersinks into timber
- Reinforced design resists breakage under load
- No ribs allow use with hinges and fittings
Sizing and applications
At 6mm diameter and 150mm length, this screw is suitable for joining solid timber sections, structural repairs, and applications requiring substantial holding power. The 12 gauge diameter provides excellent load-bearing capacity. Zinc yellow plating offers corrosion resistance for both internal and external applications, though for prolonged external exposure or coastal environments, consider stainless steel alternatives.
- 6mm diameter, 150mm length suitable for structural timber work
- Zinc yellow plating resists corrosion
- Pack of 50 screws
Pre-installation checks
Ensure your driver bit is in good condition and fully seated in the recess before applying pressure. Although the quick start point allows rapid engagement, avoid excessive force that could strip the recess. For hardwoods or dense timbers, consider pre-drilling pilot holes to reduce splitting and ease installation. Check that the timber is dry and free from knots or defects at the intended fixing point.
- Inspect driver bit for wear and correct seating
- Pre-drill pilot holes in hardwoods or dense timber
- Ensure timber is dry and defect-free at fixing point
- Avoid excessive driving force