Threaded screws and bolts, of iron or steel, whether or not with their nuts and washers (excl. coach screws and other wood screws, screw hooks and screw rings, selftapping screws, lag screws, stoppers, plugs and the like, threaded)
Wood screws of iron or steel (excl. coach screws)
Screw hooks and screw rings, of iron or steel
Selftapping screws, of iron or steel (excl. wood screws)