Tek Screw Steel T3 5.5x70mm fasteners deliver reliable performance for demanding applications. These self-drilling screws feature a hardened steel construction with a T3 point design, enabling efficient penetration through metal substrates without pre-drilling. The 5.5mm diameter and 70mm length combination suits structural assembly, roofing, and cladding projects. Supplied in bulk quantities of 100, these screws offer consistent quality and cost-effective solutions for contractors and fabricators requiring dependable fastening performance.