Spax Self-Drilling Screws D ZK T25 5.0x50 mm – Stainless Steel Fixing Screws for Demanding Outdoor Applications
The Spax Self-Drilling Screws D ZK T25 5.0x50 mm are high-performance fasteners engineered for direct drilling into wood and metal without a pre-drilled hole. With a T-Star Plus drive and cylindrical head, they deliver secure, vibration-resistant holding power in outdoor and structural applications.
Self-drilling design eliminates the need for pre-drilling, saving time and effort on every installation
Stainless steel A2 (INOX) construction provides long-term corrosion resistance for outdoor and marine environments
T-Star Plus drive ensures precise torque transfer and reduces the risk of cam-out during fastening
Fixing thread provides reliable pull-out resistance in softwood, hardwood, and light-gauge metal substrates
What Sets These Screws Apart
Unlike standard screws that require separate pilot holes, the self-drilling D ZK T25 profile cuts its own thread as it advances, creating a tight, gap-free joint in a single operation. The A2 stainless steel grade resists pitting and crevice corrosion even in humid or salt-exposed conditions.
Ideal for...
Professional tradespeople and DIY builders working on decking, railing, cladding, and outdoor furniture installations where corrosion resistance and fast, reliable fastening are essential.
Application of Spax Self-Drilling Screws D ZK T25
Position the screw at the marked drilling point
Drive the screw directly into the substrate using a T-Star Plus bit and a cordless drill
The self-drilling tip penetrates the material and forms a mating thread in one step
For thicker metal sections, a pilot hole of the recommended diameter may be required
Spax is a leading fastener manufacturer known for high-quality screws and anchors for professional and DIY applications. The brand focuses on innovation in drilling and fastening technology, with products widely used in construction, woodworking, and outdoor projects.
The Spax D ZK T25 self-drilling screws are suitable for wood, metal, and composite materials. The self-drilling design works directly in softwood, hardwood, and light-gauge steel without a separate pilot hole.
Yes. The A2 (INOX) stainless steel grade offers excellent corrosion resistance for outdoor applications, including decking, railing, and garden furniture exposed to moisture and weather.
These screws feature a fixing thread, which provides strong pull-out resistance and a secure grip in the substrate. The fixing thread design ensures the screw stays firmly in place under load and vibration.
Each pack contains 200 screws, providing sufficient quantity for typical decking, cladding, or railing projects.
The T-Star Plus drive requires a matching T-Star Plus bit. This drive system offers high torque transmission and reduced cam-out, making it well suited for power-tool installation.
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