Kennametal® Threading Insert, Series: Top Notch™, NT Insert, 3 Insert, Internal, External Thread, 60 deg Partial Profile Thread Standard, 2 to 5 mm Internal/1.25 to 4 mm External Pitch, 5 to 12 TPI Internal/6 to 20 TPI External Threads per Inch, 0.195 in Thickness, 0.344 in Width, ANSI Code: NT3RK KC5025, ISO Code: NT3RK KC5025, K Chipbreaker, Neutral Rake, 0.0065 in Corner Radius, 55 deg Included Angle, Manufacturer's Grade: KC5025, Carbide, PVD-AlTiN Coated, Material Grade: C2, C6