These 160mm heavy duty fixed castors carry loads of made of 700kgs each, making these industrial fixed castors ideal for heavy duty applications. Heavy Duty Nylon Fixed Castors are a heavy duty pressed steel zinc plated, housing a heavy duty 6 fixed nylon wheel. This fixed castor wheel runs on ball journal bearings, making heavier loads easier to move. Overall height 200mm 4 x M10 Bolt Fixing Plate. Imeediately available and great value heavy duty fixed castors. Team up with the swivel nylon castors or lockable nylon castors in the 5000 Series.