Quickly and easily calculate the dimensions of Metric Trapezoidal Screw Threads including the Major Diameter, Minor Diameter, Pitch Diameter, Tap Drill Sizes, Measurement across wires for 3 wire thread pitch diameter measuring and even feed rates. TR8 through TR1120 Metric Trapezoidal Threads are supported! Also both OD and ID threads are supported. This is a great app for Machinists, CNC Machinists, CNC Programmers, Machine Shops and QC Inspectors!