OSG Threading Tap BSF A-Spiral Flute - Powder Metal Right Hand -TiCN Coated - Blind Holes DIN2184-1 - 5/16 x 22The OSG Threading Tap BSF A Spiral Flute, made from powder metal and TiCN coated, is engineered for precise British Standard Fine threads in blind holes. Designed for professionals who demand reliability and clean, accurate threads in confined spaces. Thread type: British Standard Fine (BSF), right hand, for blind holes (DIN2184 1) with a 5 16 x 22 size. A Spiral flute design: Optimized for chip evacuation in non through holes, reducing clogging and