OSG Threading Tap - UNC Spiral Flute HSS-E - Steam Oxide Coated - Blind Hole - 3/4 x 10The OSG UNC Spiral Flute Threading Tap is a precision tool tailored for professionals who do blind hole threading in demanding metals. Built with cobalt enhanced HSS (HSS E) and finished with a Steam Oxide coating, it delivers reliable performance and extended life in tough machining environments. Thread Size: 3 4 10 UNC (coarse) for standard Unified National Coarse threads in metalworking applications Material: HSS E (high speed steel with cobalt)