Emuge GFS33106.5013 | 1/2- (13 or 20) Thread Mill ZGFI - Coolant FedFeatures: Solid carbide single plane thread mill for internal threads in a wide range of materials Different thread sizes and pitches can be produced with a single tool TICN coating for added wear resistance Product Specifications Cutter Diameter (Inch) 0. 407" Pitch 13 20 Size 1 2" Thread Standard UNC UNF Applicable Material Steel, Stainless Steel, Cast Iron, Aluminum, Titanium Application Single Plane Type ZGF I THREADS ALL Length Group 2 x D