Tek Screw Steel T3 5.5x16mm - Self-tapping steel screw engineered for rapid fastening in metal and composite substrates. The T3 thread design delivers superior holding power with minimal pre-drilling requirements, reducing installation time on job sites. Precision-manufactured 5.5mm diameter shaft with 16mm length provides optimal penetration for light to medium-duty applications. Hardened steel construction ensures corrosion resistance and extended service life in demanding environments. Ideal for HVAC, electrical, and general metal fabrication work where reliability and speed are essential.