Specifically designed for British Association (BA) threads, the Dormer E544 features a blue spiral flute design that enhances chip evacuation, making it ideal for threading in deeper or blind holes. This design reduces the risk of tap breakage and improves the overall efficiency of the threading process. Made from high-speed steel (HSS), this tap provides excellent durability and resistance to wear, ensuring long-lasting performance in demanding environments. Features & Benefits • Blue spiral flute (40°) design for enhanced chip removal • High speed steel construction for superior durability • ISO529 • Suitable for a variety of materials including steel and aluminium • Steam Tempered • Chamfer: C 2 - 3 Specifications • Diameter: 4BA • Thread Pitch: 0.66mm • Overall Length: 50mm