Developer's DescriptionBy Greg A MillerApp to calculate charts for various thread percentages for standard SAE and Metric screws.App to calculate charts for various thread percentages for standard SAE and Metric screws. Also shows hex nut size and a diagram with the screw threads to check TPI/TPMM and screw diameter.This app requires no permissions. Please rate this app after evaluating it, it is knowing that people use and love my apps that keeps the truly free app developers producing apps.