FEATURE of Best Material For Lead Screw Trapezoidal screw and trapezoidal nut Various materials screw and nut can be selected. Matching nuts are divided into flange nuts, square nuts, cylindrical nuts. Standard Standard: ISO2901-4, DIN103, GB/5796 Clearance: 7e Max Length 6000 mm Material: C45 Steel, SUS303, SUS304 and others Thread direction Right. (Left available) Diameter 10 to 80 mm Lead: 2 to 10 mm End machining Customized Stainless Steel Shaft