The Dormer E539 HSS BSF Spiral Point Tap is an excellent tool designed for creating precise British Standard Fine threads. Crafted from high-speed steel, this spiral point tap ensures exceptional durability and efficiency. The spiral point taps are engineered for optimal performance and reliability. Its high-speed steel construction ensures the tap remains sharp and effective even through extensive use. The spiral point design enhances chip evacuation, providing a more efficient and smoother threading process. Features & Benefits • High speed steel with steam tempered surface finish • ISO 529 • BSF (British Standard Fine) • Spiral point • Right hand rotation/cutting Specifications • Diameter: 1/2 • Overall Length: 89mm • Tolerance: Medium • Hole Type: Through Hole • Depth: 2.5 XD • Chamfer: B 3.5 - 5