7 Aircraft engine parts, namely, bushings, gaskets, seal rings in the nature of mechanical seals, clamps for use in precision clamping of work pieces, gear shafts, drivers, filters, impellors in the nature of distributor rotor, carbon seals in the nature of mechanical seals, bearing brackets, shrouds, plate seals in the nature of mechanical seals, heat shields for reducing temperature between engines and manifold and carburetor, engine fuel pump covers, ball-socket seals in the nature of mechanical seals, gasket housings, stud shoulders in the nature of head studs, mating rings in the nature of piston rings, spur gears, engine ducts, springs, handbrake knobs, and engine bearings in the nature of miniature bearings and sub bearing shafts for aircraft analog equipment