JOPAL APPLICATION SYSTEM

Self-Drilling Screws

JOPAL self-drilling screws are engineered for direct fastening in steel, metal roofing, wall cladding, sandwich and composite panels, profiled sheets, steel decking, purlins, overlaps, side laps and flashings. Selection depends on the complete connection build-up, base material and steel thickness, drilling capacity, drill-point geometry, fastener length, clamping range, thread and support-thread configuration, washer and EPDM sealing requirement, corrosion exposure and required technical documentation. The JOPAL range includes carbon-steel, bi-metal and stainless-steel self-drilling fasteners for light-gauge and heavier steel applications, weather-sealed building-envelope connections and general metal-to-metal construction. Explore the relevant product systems and application guidance, or contact JOPAL for technical selection and UAE project supply.

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RELEVANT PRODUCTS

Products connected to this application.

BIFIX® 4.8XL 1P EcoZin - Self-Drilling Screws | JOPALBIFIX-CS-48-1PBIFIX® 4.8XL 1P EcoZinView technical productBIFIX® 5.5XL & 6.3XL 3P EcoZin - Self-Drilling Screws | JOPALBIFIX-CS-55-63-3PBIFIX® 5.5XL & 6.3XL 3P EcoZinView technical productBIFIX® 5.5XL & 6.3XL High Thread 3P EcoZin - Self-Drilling Screws | JOPALBIFIX-CS-HT-3PBIFIX® 5.5XL & 6.3XL High Thread 3P EcoZinView technical productBIFIX® 5.5XL 5P EcoZin - Self-Drilling Screws | JOPALBIFIX-CS-55-5PBIFIX® 5.5XL 5P EcoZinView technical productBIFIX® Bi-Metal Stainless Steel 304 5.5XL & 6.3XL 3P UltraZin - Self-Drilling Screws | JOPALBIFIX-BM-55-63-3PBIFIX® Bi-Metal Stainless Steel 304 5.5XL & 6.3XL 3P UltraZinView technical productBIFIX® Bi-Metal Stainless Steel 304 5.5XL & 6.3XL High Thread 3P UltraZin - Self-Drilling Screws | JOPALBIFIX-BM-HT-3PBIFIX® Bi-Metal Stainless Steel 304 5.5XL & 6.3XL High Thread 3P UltraZinView technical productBIFIX® Bi-Metal Stainless Steel 304 5.5XL 5P UltraZin - Self-Drilling Screws | JOPALBIFIX-BM-55-5PBIFIX® Bi-Metal Stainless Steel 304 5.5XL 5P UltraZinView technical productBIFIX® SS304 4.8XL 1P - Self-Drilling Screws | JOPALBIFIX-SS304-48-1PBIFIX® SS304 4.8XL 1PView technical product
ENGINEERING SELECTION

What matters for this connection.

Fastener selection

Match the drill point to the total steel drilling thickness, then confirm screw length, thread engagement, head style and washer configuration for the connection.

Installation control

Use the correct driver and installation speed, keep the fastener perpendicular to the work and avoid over-driving. The drill point must complete drilling before the thread is expected to form and clamp the connection.

Connection checks

Check substrate thickness, connected-material build-up, required clamping range, environmental exposure and the documented capacities of the selected product.

ENGINEERING RESOURCES

Technical guidance for this application.

Use these engineering resources for the principles behind selection, installation and connection behaviour. Product suitability remains governed by the documented JOPAL product data.

standardHow Self-Drilling Screw Standards Fit Together: Product, Performance and Connection DesignEngineering comparison of the main standards used around self-drilling and tapping screws, separating thread geometry, product dimensions, mechanical performance, connection resistance and assessment requirements.Read engineering resource →application noteCorrect Installation of Self-Drilling Screws: Speed, Pressure and Driving ControlA self-drilling screw performs several operations within seconds: drilling, thread formation, clamping and final seating. Correct speed and axial pressure are essential throughout that sequence.Read engineering resource →referenceHow Base Steel Thickness and Strength Affect Screw PerformanceBase steel thickness and strength affect both installation and resistance. The same screw can behave differently when either property changes, even when the nominal screw diameter remains identical.Read engineering resource →guidePull-Out and Pull-Over Resistance in Sheet Metal Screw ConnectionsEngineering guide to pull-out and pull-over resistance in sheet-metal screw connections, including governing failure modes, support and sheet effects, washer bearing, installation and design checks.Read engineering resource →referenceThread Engagement in Thin Steel: What Determines a Reliable Connection?Thread engagement in thin steel is governed by the interaction between thread geometry and the available substrate, not by screw diameter alone. Understanding this interaction is essential when evaluating pull-out behaviour.Read engineering resource →guideWhy Drill Point Geometry Matters in Steel FasteningEngineering guide to self-drilling screw drill point geometry, including cutting edges, flute design, point length, chip removal, heat generation and the transition into thread engagement.Read engineering resource →guideSelf-Drilling vs Self-Tapping Screws: Engineering Differences and SelectionSelf-drilling and self-tapping screws are not interchangeable terms. Their difference begins with how the hole is produced and directly affects installation sequence, substrate suitability and connection reliability.Read engineering resource →guideUnderstanding Drilling Capacity in Self-Drilling ScrewsEngineering guide to self-drilling screw drilling capacity, including drilling build-up, supporting-steel thickness, clamping range, drill-point selection and installation control.Read engineering resource →
SELECTION QUESTIONS

Common questions for this application.

How is the drilling capacity of a self-drilling screw selected?

The drill point must be suitable for the steel thickness it has to penetrate. Check the product drilling-capacity range against the actual supporting steel before selecting the screw.

Is a longer self-drilling screw automatically suitable for thicker steel?

No. Screw length controls the connection build-up and engagement, while drilling capacity is governed by the drill-point design. Both requirements must be checked separately.

What should be checked after installation?

Confirm correct seating, adequate thread engagement and clamping, and that any sealing washer is compressed correctly without being crushed or displaced.