Sandvik Coromant Threading Insert, Series: CoroThread® 266, 266LL Insert, 16 Insert, Triangular Shape, Internal Thread, 60 deg Partial Profile Thread Standard, 0.059 to 0.118 in Pitch, 8 to 16 Threads per Inch, 3/8 in Inscribed Circle, 0.156 in Thickness, ANSI Code: 266LL-16VM01A002M 1135, ISO Code: 266LL-16VM01A002M 1135, A Chipbreaker, Negative Rake, 0.004 in Corner Radius, 60 deg Included Angle, Manufacturer's Grade: 1135, Left Hand Cutting Direction, Carbide, PVD-TiCrAlN+TiN Coated, Material Grade: H, K, M, N, P, S