Lifted head are often called oval shaped head, and they have got angle which is analogous to that of flat screw but they have got dome formed head. Also they are referred to as as spanners; they provide stability with protecting the completed glimpse. Their heads are flat by which https://typesofwoodscrew15924.ziblogs.com/29444165/new-step-by-step-map-for-types-of-lead-screw