Spax® Screw, Chipboard, Countersunk Head with PZ Cross Slot, Fully Threaded
Spax® Screw, Chipboard, Countersunk Head with PZ Cross Slot, Fully Threaded is a high-quality, building... Read More
Product Details
Spax® Screw, Chipboard, Countersunk Head with PZ Cross Slot, Fully Threaded is a high-quality, building regulations approved screw designed for reliable fixing in timber and similar applications. Supplied in a convenient 200 Pack, this Yellox coated screw offers outstanding corrosion resistance and a clean, professional finish—perfect for trade and DIY use alike.
Engineered with durability in mind, the screw is made from steel and features a countersunk head for neat, flush installation. Once driven, the countersunk design helps create a tidy surface that’s ideal when a smooth final finish matters.
Powerful driving performance comes from the PZ cross slot drive, providing secure engagement for faster, more controlled screwing. The screw is fully threaded, helping to pull materials together firmly for strong, long-lasting joints.
What makes this version stand out is the precision tip and advanced drive system: the square tip uses a patented shaft profile and multihead technology to support consistent penetration and reliable starts—reducing the likelihood of snagging or wandering during installation.
Finished in yellow chromated coating, this model not only looks the part but is also Building regulations approved (Z-9.1-235). If you’re looking for dependable screws for your next project, choose Spax® Screw, Chipboard, Countersunk Head with PZ Cross Slot, Fully Threaded, length 50 mm, with thread Ø 3.5 mm, and get your 200-pack supply ready for work.
Specifications
Colour/finish
Yellow chromated
Material
Type of head
Drive
Thread
Version
Square tip with patented shaft profile and multihead
Approval
Product Details
What does the 3.5x50 mm marking mean?
3.5 mm is the screw thread diameter and 50 mm is the overall screw length. This size is commonly used for joining timber and sheet materials where a secure fixing depth is needed.
Are these screws fully threaded?
Yes, this model has a fully threaded shank. Fully threaded screws help pull materials together along the full length, which can improve clamp and hold in timber based applications.
Which screwdriver or bit do I need for the PZ drive?
These screws use a PZ cross slot drive. You will need a PZ compatible screwdriver or PZ bit to fit correctly. Using the right bit helps reduce cam out and helps keep the screw head in good condition while driving.
Will the countersunk head sit flush?
Yes, the countersunk head is designed to sit flush in suitable materials, making it a good choice when you want a cleaner finish. For best results, ensure the screw hole is prepared to suit the countersunk head profile.
What is the yellow coating, and does it affect use?
The screws feature a yellow chromated coating finish. This coating is typically used to help protect the steel and improve corrosion resistance compared with untreated screws, making them suitable for many general building and interior fixing tasks.
How many screws are included in the pack?
This product is supplied as a 200 pack, which is useful for larger jobs, repeated repairs, or projects where you want to keep consistent fixings on hand.
Are these suitable for building regulation approved applications?
They are listed as Building regulations approved under Z 9.1-235. If you are working to specific specification requirements, this approval can help you select the right fixing with confidence.