Sandvik Coromant Threading Insert, Series: CoroThread 266, 266LL Insert, 22 Insert, Triangular, Internal, 30 deg Trapezoidal, 0.197 in Pitch, 1/2 in Inscribed Circle, 0.219 in Thickness, ANSI Code: 266LL-22TR01F500E 1020, ISO Code: 266LL-22TR01F500E 1020, F Chipbreaker, 60 deg Included Angle, Manufacturers Grade: 1020, Left Hand Cutting, Carbide, TiN, Material Grade: H, K, M, N, P, S