That is a unique thread in which one screw has two unique thread measurements. Superior threads are taller and sharper than regular threads, necessitating significantly less power to push in. Trapezoidal threads can also be equipped to handle higher axial loads. These threads, due to their production simplicity and load https://types-of-plumbing-repair72604.ourcodeblog.com/29493710/detailed-notes-on-types-of-screw-heads-for-screwdrivers