6
Common metals and their alloys; metal building materials; transportable buildings of metal; materials of metal for railway tracks; non-electric cables and wires of common metal; ironmongery, small items of metal hardware; pipes and tubes of metal; safes; goods of common metal not included in other classes; ores.
machine parts, namely, metal nuts, metal screws, metal bearing spacers, metal shaft spacers, and metal clevis pins, metal dowel pins, metal cotter pins, metal washers
7
Machines and machine tools; motors and engines (except for land vehicles); machine coupling and transmission components (except for land vehicles); agricultural implements other than hand-operated; incubators for eggs.
machine parts, namely, bearings, belts, brakes, bushings, camshafts, chains in the nature of chains for conveyors, driving chains other than for land vehicles, transmission chains other than for land vehicles, roller chains being parts of machines, shaft clamps, clutches, shaft collars, couplings, hand cranks, drum dials for making machine adjustments, drive chains, gears, gear boxes, gear drive belts, gear racks, handles in the nature of knurled handwheels, pin hubs, clamp hubs, gear lever knobs for machines, lead screw, leveling mounts, linear ball slides, linear roller slides, pressure rollers, pulleys, retaining rings, transmission shafts other than for land vehicles, shaft adapters, shaft extensions, shaft hangers, shaft wipers, shaft seals, springs, chainwheel sprockets, cam sprockets, stud mounts, threaded inserts, timing mechanisms in the nature of cam sprockets and chains, timing belts, ratchet and pawls