Performs well below situations of significant torque and practical for purposes where vibrations can promptly loosen improperly tightened screws The flange underneath replaces the need for any washer and enables the screw to stay in position less difficult. The flange screw head is also called a frame screw and is https://typesofplumbingrepair82581.blogoxo.com/29505806/the-definitive-guide-to-kinds-of-screw-heads