OSG Threading Tap - UNF Spiral Flute HSS-E - Steam Oxide Coated - Blind Hole - 7/16 x 20The OSG UNF Spiral Flute Threading Tap is a precision tapping tool designed for blind hole applications, delivering accurate threads with consistent results. Crafted for demanding metalworking tasks, it combines cobalt enhanced HSS with a durable steam oxide finish to stand up to higher speeds and tougher materials. Thread Type: UNF (Unified National Fine) with a spiral flute geometry that promotes smooth cutting and efficient chip evacuation in blind