components for heavy duty truck/trailer air brake systems and fuel systems; namely, slack adjusters; gladhands; fuel tank caps, gaskets and lock assemblies therefor; air brake lines and connectors therefor; air tank drain valves; air tank fittings and drain cocks; fuel tank selector valves; and air control valves including air start valves, tractor park valves, tractor protection-control valves, tractor-trailer park valves, tractor-trailer air supply valves, parking brake valves, tractor protection-control valves and check valves
Nonmetallic Building Materials