The trapezoidal thread is analogous for the acme thread, other than that the thread angle is 300. It can be manufactured in metric dimensions; that may be why it really is often called "metric lead screw" or "metric acme screw." Nevertheless, there are many types of screw heads which are https://typesofrooftile15737.widblog.com/84371369/5-essential-elements-for-lead-screw-thread-type