7 Machine parts, namely, bearings, namely, roller bearings, spherical plain bearings, ball bearings, anti-friction bearings, engine bearings, high performance bearings, precision bearings, machine tool bearings, integrated bearings, and aerospace bearings; integrated bearing assemblies being machine parts; bearings being machine parts and parts thereof, namely, cups, cones, rollers, balls, spacers, retainers, cages and shields; machine parts, namely, bearing housings, covers and closures; seals and seal wear rings for bearings being machine parts; machine parts, namely, lubricators for roller bearings; precision bearing inserts being machine parts; aircraft and boat parts, namely, engine bearings and engine bearing parts, namely, cups, cones, rollers, balls, spacers, retainers, cages and shields