Stanley National N112-169 Zinc Plated Rigid Box Rail Hanger with 3-1/8" Bolt (225 lb Capacity) Zinc Plated Rigid Box Rail Hanger W/ 3-1/8" Bolt (225 Lb. Capacity) For Use With59,5100,5103,5104,5105,5110,5114 Or5116 Box Rail Includes Truck, Connecting Bolt And Nuts