In thread rolling, the steel rod (the blank substance) is compressed concerning two roller dies made up of a thread profile. The dies deform the surface from the blank right after a number of passes; this transfers the thread profile to your workpiece. 16–22. USS, metric, Whitworth, and BA expectations https://typesofdecking18495.bloggerchest.com/29289371/facts-about-types-of-screw-heads-revealed