The thread is the core bearing part of self-drilling screws. Thread pitch, thread depth and tooth profile directly affect drilling speed, gripping force, anti-loosening performance and construction adaptability. A single standard thread cannot match all base materials, which is why we develop diversified thread structures for different application scenarios.

Different Thread Pitch for Different Plates

Fine pitch threads feature dense teeth with small spacing. They are designed for thin color steel sheets, aluminum veneers and thin insulation boards. Dense threads evenly disperse pressure, preventing sheet deformation and avoiding thread slipping during installation. Coarse pitch threads carry wider tooth spacing. They apply to thick steel keels, timber beams and multi-layer composite panels. Larger gaps between threads allow metal debris to discharge smoothly, reducing drilling resistance and greatly improving construction efficiency.

Thread Depth Decides Long-Term Holding Power

Shallow threads are suitable for thin-wall soft metal. The shallow tooth design avoids piercing the substrate while maintaining basic clamping force, ideal for lightweight decorative projects. Deep full threads adopt higher tooth height, with deeper bite into steel plates. The increased contact area creates powerful occlusion. Even under long-term wind vibration, temperature expansion and contraction, the screws will not loosen or pull out, perfectly matching metal roofing, exterior wall engineering and prefabricated steel structures with high safety requirements.

Optimized Tooth Profile for Smooth Drilling

Our threads are cold rolled with smooth arc tooth shape, no burrs or sharp edges. Compared with rough irregular threads, they will not scratch the anti-corrosion coating of plates during screwing, effectively delaying rust at the joint.

We support customized thread pitch, thread depth and thread shapes according to customer project demands. Whether thin sheet decoration or heavy steel construction, matched thread structures bring stable fixing, low failure rate and long service life for your global projects.