Sandvik Coromant Threading Insert, Series: CoroThread 266, 266LL Insert, 22 Insert, Triangular Shape, Internal Thread, Stub Acme Thread Standard, 6 Threads per Inch, 1/2 in Inscribed Circle, 0.219 in Thickness, ANSI Code: 266LL-22SA01F060E 1020, ISO Code: 266LL-22SA01F060E 1020, F Chipbreaker, 60 deg Included Angle, Manufacturers Grade: 1020, Left Hand Cutting Direction, Carbide, PVD-TiN Coated, Material Grade: H, K, M, N, P, S