Self-Drilling Screw
Source self-drilling screw from India's verified manufacturers and exporters on Himalay. Browse the full range for industrial and export applications.
About Self-Drilling Screw
Self-drilling screws combine a drill-bit point with a tapping thread so they drill their own hole and form the mating thread in a single driving operation, removing the need for a separate pilot hole in metal. Often called Tek screws, they are widely used in steel construction, roofing and cladding, HVAC ductwork, metal framing and sheet-metal assembly, where fast, single-pass fixing into steel is needed. The category is defined chiefly by drill-point capacity: point numbers (for example No.1 to No.5) indicate the steel thickness the screw can drill, from thin sheet up to thicker structural sections. Dimensional and performance requirements follow DIN 7504 (self-drilling tapping screws), with the DIN 7504 N variant drilling plate thicknesses from around 2 mm at smaller diameters up to about 6 mm at larger ones, and sizes commonly 3.5 mm to 6.3 mm. Head forms include hex washer (with a bonded EPDM washer for roofing weather-sealing), pan, countersunk and wafer, with Phillips, Pozidriv, Torx and hex drives. Materials are hardened, case-hardened carbon steel so the point stays hard enough to drill while the body resists torsion, with bimetal (stainless body, hardened point) and coated variants for corrosion resistance. Coatings include zinc, organic and ceramic top-coats and bimetal stainless for exterior roofing service. Drill capacity, thread pitch and washer sealing are the key specifications. Himalay coordinates material traceability with EN 10204 3.1 certificates where requested, dimensional inspection, core-hardness and drill-time/torque verification and salt-spray data for coated lots; consistent point hardness, sealing-washer integrity, RoHS declarations and SABER routing for GCC entry are coordinated as part of the standard order flow.
