Studs ASTM A193 with double heavy nut ASTM A194 B7-SH (Black) 30x160mm: 60 pcs. 20x125: 100 pcs. 18x110mm: 200 pcs. 18x140mm: 100 pcs. 20x160mm: 100 pcs. 20x110mm: 300 pcs. 20x215mm: 100 pcs. 16x90mm: 500 pcs. 16x220mm: 200 pcs. 12X70mm: 150 pcs.