Iscar Threading Insert, Laydown, Series: ISCARTHREAD, 16IR Insert, 16 Insert, Triangular Shape, Internal Thread, Stub Acme Thread Standard, 8 Threads per Inch, 9.52 mm Inscribed Circle, 3.63 mm Thickness, 16.49 mm Length, ISO Code: 16IR 8 STACME IC908, 60 deg Included Angle, Manufacturer's Grade: IC908, Right Hand Cutting Direction, Carbide, PVD-TiAlN Coated, Material Grade: H, K, M, P, S