Seco Threading Insert, Laydown, Series: Snap-Tap, 16NR Insert, 16 Insert, Internal, UN, 8, 9.5 mm Inscribed Circle, 3.5 mm Thickness, 16.5 mm Length, ANSI Code: 16NR8UN-A1 CP500, ISO Code: 16NR8UN-A1 CP500, A1 Chipbreaker, 0.25 mm Corner Radius, 60 deg Included Angle, Manufacturers Grade: CP500, Right Hand Cutting, Carbide, TiAlN/TiN, Material Grade: M