Self-Drilling and Self-Tapping Screws
Self-drilling screws (SDS) utilize a specialized drill point, categorized by numbers denoting their maximum drilling capacity, to bore through substrates prior to thread engagement. The integrated drilling and tapping phases ensure optimal thread-to-hole geometric matching, producing joints with high shear capacity and resistance to vibrational loosening. Manufactured primarily from case-hardened carbon steel or martensitic stainless steel, they withstand extreme torsional stresses during installation. These fasteners dominate applications involving heavy-gauge steel framing, metal cladding, and rapid industrial assembly.