... Screw pitch(lead) Up to 50mm Material SUS304,SUS303,Cr13,2Cr13,3Cr13,40Cr,20Cr,45#,35#,20#,Q235,copper,aluminum and etc Application ... Products are widely used in tool, spinning, medical equipment, exercises machines, car and other industry ... for good survice,offer us your drawings for better quotation and other details. trapezoidal lead screw and Nuts