How and where to use guide
A500804STB Ulti-mate II Professional Woodscrew PoziSquare Double Csk Z&Y - (10g) 5mm X 80mm - 200
Typical applications
These 5mm x 80mm screws are ideal for general-purpose woodworking, joinery, cabinet making, and structural timber connections where a neat countersunk finish is required. They perform well in both softwood and hardwood framing, and are equally effective for fixing sheet materials including plywood, chipboard, OSB and MDF to timber frames or battens. The double countersunk head makes them suitable for applications where a flush, professional appearance is important, such as visible joinery or fitted furniture.
- Hardwood and softwood framing and joinery
- Sheet material fixings (plywood, MDF, chipboard, OSB)
- Cabinet and fitted furniture assembly
- Sheet metal fixings where timber connection is required
- Applications requiring a neat, flush countersunk finish
Installation and driving
The Stick-Fit drive system is engineered to grip the screw head securely, allowing smooth, controlled driving with minimal risk of bit slip or cam-out. Insert the included Stick-Fit driver bit firmly into the screw head recess before driving. The patented design enables one-handed operation, freeing your other hand to hold or position the workpiece. The Type-17 slash point is self-starting and cuts through hard timber efficiently, reducing the need for pre-drilling in most softwood and board applications. For hardwoods or dense timbers, consider pre-drilling pilot holes to prevent splitting and ensure clean, accurate seating of the countersunk head.
- Use the included Stick-Fit driver bit for optimal performance
- Insert bit firmly and fully into the screw head recess
- Type-17 point is self-starting in most timber and boards
- Pre-drill pilot holes in hardwoods or dense timbers to prevent splitting
- Ensure the double countersunk head seats fully flush with the surface
Compatibility and bit selection
Although the Stick-Fit drive system is the recommended choice, the screw head design is fully compatible with standard POZI and Phillips driver bits. This flexibility allows you to use existing bits from your tool kit if needed, though the Stick-Fit bit will deliver superior grip and control. Always select a bit size that matches the recess precisely to avoid damage to the drive system and ensure reliable, one-handed driving performance.
- Stick-Fit driver bit included in every box
- 100% compatible with POZI and Phillips bits as alternatives
- Stick-Fit bit recommended for best performance and one-handed operation
- Ensure bit is fully seated in the recess before driving
On-site tips and limitations
The wide, deep single thread provides rapid insertion and strong holding power, reducing installation time on busy sites. Store screws in a dry environment to maintain the zinc and yellow passivation finish. Whilst these screws perform well in most timber and board applications, always check that the 80mm length is appropriate for your specific fixing depth and material thickness. Do not over-tighten, as this can strip the thread or damage the countersunk head seating. For sheet metal fixings, ensure adequate pilot holes are drilled to prevent material distortion.
- Wide, deep thread enables rapid insertion and strong holding
- Store in dry conditions to preserve the zinc and yellow finish
- Verify 80mm length is suitable for your application depth
- Avoid over-tightening to prevent thread stripping or head damage
- Pre-drill sheet metal to prevent distortion and ensure clean fixing