7 MACHINE PARTS, NAMELY, ELBOWS, CONNECTORS, CLAMPS, COUPLINGS, CHUCKS, ENDS, STEMS, SPLICERS, ADAPTERS, UNIONS, SLEEVES, NUTS, DRAIN COCKS, PLUGS, BUSHINGS, NIPPLES, TEES, JOINTS, CAPS, TUBING, THREADED FASTENERS, VALVES, VALVE COCKS, GREASE GUN COUPLERS, AND BRAKE LININGS