OSG Threading Tap BSF A-Spiral Flute - Powder Metal Right Hand -TiCN Coated - Blind Holes DIN2184-1 - 1/2 x 16The OSG BSF A Spiral Flute Threading Tap is designed to cut British Standard Fine threads in blind holes with precision and reliability. Built for machinists, shop floors, and CNC operators, it delivers clean, accurate threads even in tight, non through cavities. Thread Type: BSF (British Standard Fine), right hand thread for standard tapping operations in blind holes. A Spiral Flute Design: Optimized for chip evacuation in blind holes, reducing