7 [ Machine parts, namely, mechanical seals; ] gaskets and seals for machine motors and gears, namely, [ cylinder head gaskets, ] rotary shaft seals, [ valve cover gaskets, valve stem sealings, ] * and *oil seals; [ oil pan seals, intake manifold seals, water pump seals, cylinder head cover seals, carburetor air filter sealings, cylinder head cap seals, camshaft carrier seals, ramming chamber sealings, push rod space seals, 0-ring seals and profile rings; attachments for machines and apparatuses, for motors and gears other than motors and gears for vehicles, made of metal and of plastic, namely, valve covers, exhaust manifolds, oil pans and heat shields; subassemblies comprising a plurality of components for attaching to machines, motors and gears other than motors and gears for vehicles, comprising an attachment, namely, a valve cover, an oil separator cover or a filler cap, made of metal or of plastic, an elastomer gasket and fastening elements, namely, screws, sleeves and/or bolts; ] and plastic components for the construction of machines and apparatuses, for construction of motors and gears other than motors and gears for vehicles, namely, [ push rod protective tubes, dampening elements for guide bushings, rubber-sheathed bearing bushings, dust and protection caps, pistons and piston guides, ] nozzles, [ fixing and transport rollers for machines or apparatuses, ] bellows, [ membranes, ] electric insulators, heat insulators, [ heating elements, ] lip seals, [ friction bearings, ] collars, bearing rings and tubes