The types of screw heads Diaries
in the course of these screws they have 6 point star form and they're normally used for electronics goods which include DVD gamers and computers. flat head screwhex head screwlag screwsPhillips screw headRobertson screw headself-tapping screwsTorx screw head The most common types of machine screw head styles are pan head, flat head, spherical hea