Sandvik Coromant Threading Insert, Series: CoroThread 266, 266RL Insert, 27 Insert, Triangular, Internal, API Rotary Shoulder, 4, 5/8 in Inscribed Circle, 0.276 in Thickness, ANSI Code: 266RL-27V501A0402E 1125, ISO Code: 266RL-27V501A0402E 1125, A Chipbreaker, Negative Rake, 60 deg Included Angle, Manufacturers Grade: 1125, Right Hand Cutting, Carbide, TiCrAlN/TiAlN, Material Grade: H, K, M, N, P, S