Pramet Threading Insert, Full Profile Negative, TN Insert, 22 Insert, Triangular Shape, Internal Thread, 29 deg ACME Thread Standard, 6 Threads per Inch, 1/2 in Inscribed Circle, 0.185 in Thickness, 0.866 in Length, ISO Code: TN 22NR060ACME T8030, 60 deg Included Angle, Manufacturers Grade: T8030, Right Hand Cutting Direction, Carbide, Material Grade: H, K, M, N, P, S