Stud bolts DIN 976 Fully threaded 1 3/8'' UNC X 310mm A193 grade B7 HDG or alternatively plain 535 pcs. Nuts (h=d) 1 3/8'' UNC A194 grade 2H HDG or alternatively plain 1.175 pcs. Washers DIN 125 1 3/8'' UNC A194 grade 2H HDG or alternatively plain 1.155 pcs.