1. Stud bolts in ASTM A193 B7 with nuts ASTM A194 2H for flange Ansi ½” 600#RF, with finishing [Zn-Ni Electro pl + PTFE top coat] 1/2"-13unc , length 80 mm or 85 mm 50 pcs. 2. Stud bolts in ASTM A193 B8M2 (Cl 2B) with nuts ASTM A194 8M for flange Ansi ½” 1500#RF 3/4"-10unc , length110mm 50 pcs.