No. 216 hangers are designed for heavy duty applications. This hanger is flush mounted inside the trough permitting dust-tight or weather-proof operation. Hard iron or bronze bearings are normally furnished; however, the hanger can be furnished with other bearings. Martin Conveyor Hanger, 216 Style, 18 in Conveyor Diameter, 3 in Coupling, 3-1/2 in Mounting Hole Center, 5/8 x 1-3/4 in Bolt, 19 in Top Frame Length, 60 in Top Frame Width, 1/2 in Top Frame Thickness, 4 Mounting Bolts, 11/16 x 1-11/16 in Slot, Steel