Seco Threading Insert, Laydown, Series: Snap-Tap, 16NRA Insert, 16 Insert, Internal, 55 deg Partial Profile, 0.5 to 1.5 mm Pitch, 48 to 16, 9.5 mm Inscribed Circle, 3.5 mm Thickness, 16.5 mm Length, ANSI Code: 16NRA55 CP500, ISO Code: 16NRA55 CP500, 0.08 mm Corner Radius, 55 deg Included Angle, Manufacturers Grade: CP500, Right Hand Cutting, Carbide, TiAlN/TiN, Material Grade: M