All comments are now on the Fireball forum, a place to ask questions, share your thoughts, and easily search for topics that interest you. Find it here: https://fireball.discourse.group/ What screw is more powerful? A large diameter or a small diameter? I test the force of 4 different screws diameter. Let's find out. I'm working on a cool project, but need to find the best screw for the job. Today I test many screws, all with the same threads per inch, in order to determine the ideal mechanical advantage to friction ratio. Build your own press or screw tester https://fireballtool.com/download-frame-nut-plate-step-files