High performance all purpose self-countersinking screw for fast accurate driving into softwood, ch...High performance all purpose self-countersinking screw for fast accurate driving into softwood, chipboard and most hardwood. Features 2 patented slots to prevent splitting close to the edge, and ribs & tucks to enable flush fitting without surface damage. The waxed thread and zinc and yellow passivation provide up to 20x more rust resistance than standard BZP screws. Designed for maximum precision with a 20deg needle point sharp enough to penetrate almost all timbers without the need for a pilot hole. A wide, deep thread reduces driving resistance by up to 40%, requiring less torque for faster completion. The reinforced collar prevents snapping and adds depth.
B&Q - Cutter Screws 8221450Pb High Performance 4mm X 50mm Tub Of 900Free delivery in 1–3 days£29.38Visit shop →
Product Information
Full details
This guide is for anyone using Reisser Cutter Pozi Screws. These screws are designed for fast, accurate driving into softwood, chipboard, and most hardwoods, offering superior rust resistance and reduced driving resistance. Note that while they penetrate most timbers without pilot holes, extremely hard or dense woods may still require pre-drilling.
All features
Colour
Yellow
Model Part Number
8221S220600602
Brand
Reisser
Extended Product Information
FAQs
What type of bit do I need?
You need a Pozidriv (PZ) bit.
Do I always need to pre-drill?
No, but it's recommended for hardwoods or when working close to the edge of the wood to prevent splitting.
What is the benefit of the reinforced collar?
The reinforced collar prevents the screw from snapping and adds extra depth for increased durability.
What makes these screws rust-resistant?
The zinc and yellow passivation provide up to 20x more rust resistance than standard BZP screws.
Why is the thread waxed?
The waxed thread reduces driving resistance and makes the screw easier to insert.
Where can I use these screws?
These screws are suitable for softwood, chipboard, and most hardwoods, ideal for construction, DIY projects, and professional trades.
Troubleshooting
Screw head stripping
Use the correct size and type of Pozidriv bit. Reduce the driving torque if necessary.
Screw not countersinking properly
Ensure the screw is perpendicular to the surface. Check for obstructions. Pre-drill if the wood is too hard.
Screw snapping during installation
Pre-drill for hardwoods. Reduce driving torque. Ensure the screw is aligned correctly.
Pros and Cons
Pros
Fast and accurate driving.
Excellent rust resistance.
Reduced risk of wood splitting.
No pilot hole needed in most cases.
Durable design with a reinforced collar.
Requires less torque for faster completion.
Cons
May require pilot holes in very hard wood.
Specific to Pozidriv head bits.
More expensive than standard screws.
Setup, Compatibility & Care
Bit Compatibility: Use a Pozidriv (PZ) bit. Ensure the bit is the correct size for the screw.
Pilot Holes: While designed to penetrate most timbers without pilot holes, pre-drilling is recommended for hardwoods or when working near edges to prevent splitting.
Driving: Use a power drill or screwdriver with the correct torque settings to avoid over-driving and damaging the wood. Drive the screw straight to ensure a flush finish.
Care: Store screws in a dry environment to prevent corrosion. Clean the screw heads of debris during use to maintain optimal fit with the driver bit.