How and where to use guide
A400500 Ulti-mate II Professional Woodscrew PoziSquare Double Csk Z&Y - (8g) 4mm X 50mm - 200
Typical applications
These 50mm screws are ideal for fastening timber components where a countersunk finish is essential. Common uses include fixing hinges, latches, and hardware to doors and frames, assembling joinery, attaching cladding, and general carpentry where the screw head must sit flush with the surface.
- Door and window furniture installation
- Joinery assembly and repairs
- Cladding and panelling work
- Hinge and latch fixing
- General carpentry where flush finish required
Driving and installation
The pozisquare recess accepts both PH (Phillips) and PZ (Pozidriv) drivers, offering flexibility on site. The quick start point allows rapid starting with minimal force, reducing operator fatigue. The self-centering recess provides excellent stick-fit and stable driving with minimal risk of camout. Drive the screw steadily without excessive force; the reinforced double angle head will self-countersink into most timbers. For hardwoods or dense timber, a pilot hole may improve results and reduce splitting risk further.
- Use PH or PZ driver of appropriate size
- Apply steady, controlled pressure without forcing
- Allow the quick start point to engage first
- Self-countersinking head seats flush automatically
- Consider pilot holes in hardwoods or near edges
Material suitability and limitations
These screws are designed for use in softwoods and hardwoods. The slotted shank design actively reduces wood splitting, making them suitable for use close to timber edges and in sensitive applications. The absence of ribs on these smaller sizes makes them particularly suitable for use with hinges and fittings where a clean appearance and reliable performance are required. Zinc yellow plating provides corrosion resistance suitable for interior use and protected external applications.
- Suitable for softwood and hardwood
- Slotted shank reduces splitting risk
- No ribs allow clean use with hinges and hardware
- Zinc yellow plating for corrosion resistance
- Not suitable for unprotected external exposure
On-site handling and storage
Store screws in a dry environment to maintain the zinc yellow plating integrity. Keep the original packaging or a sealed container to prevent moisture ingress and corrosion. Ensure the correct driver size is used to maximise the anti-camout benefits of the pozisquare recess and prevent damage to the screw head. Inspect screws before use for any damage or corrosion.
- Store in dry conditions in original packaging
- Keep away from damp environments
- Use correct driver size to prevent camout
- Check for damage before installation