Harvey Tool 54290-C3 | 0.6250" (5/8) Diameter x 0.1150" LOC x 0.6250" (5/8) Shank x 6 Flute AlTiN Coated Carbide Multi-Form Thread Milling CutterHarvey Tool Thread Milling Cutters Single Form UN Threads can mill multiple pitches, and cut internal and external Tip of included angle ground to a point Mills right hand and left hand threads CNC ground in the USA Solid carbide Product Specifications Tool Number 54290 C3 Cutter Diameter (Inch) 0. 6250" (5 8) Neck Diameter (Inch) 0. 4200" Length of Cut (Inch) 0. 1150" Overall Length (Inch) 4. 0000" (4) Max Depth of Thread (Inch) 2. 2500" (2 1 4)