B39/120-220 Support hook Support hook for center hanging of tray with threaded rod. Locked with 2 pcs of flange nut (not included). Material # Weight, kg (lbs) Pack Zinc plated 11 491 17 0.08 (0.18) 6 Hot Dip Galvanized 11 492 17 0.08 (0.18) 6 Stainless/Acid proof 11 493 17 0.08 (0.18) 6 B39/320-422 Support hook Material # Weight, kg (lbs) Pack Zinc plated 11 491 18 0.30 (0.66) 6 Hot Dip Galvanized 11 492 18 0.32 (0.70) 6 Stainless/Acid proof 11 493 18 0.30 (0.66) 6