Sandvik Coromant Threading Insert, Series: CoroThread 266, 266RG Insert, 22 Insert, Triangular, External, UN, 7, 1/2 in Inscribed Circle, 0.219 in Thickness, ANSI Code: 266RG-22UN01A070M 1020, ISO Code: 266RG-22UN01A070M 1020, A Chipbreaker, Negative Rake, 60 deg Included Angle, Manufacturers Grade: 1020, Right Hand Cutting, Carbide, TiN, Material Grade: H, K, M, N, P, S