In this work, computer aided design software for the analysis and design of Power Transmission Screws, is presented. In designing the software, the relevant equations and models were assembled and carefully programmed using Microsoft Visual Basic.Net (an object oriented programming language). Also visual representation of the solution to problems of Power Transmission Screw was developed, in form of graphical solutions. The software was tested on a variety of bench mark problems. The solutions obtained were highly accurate, thus validating the performance of software.