Tubes and industrial hoses for use with fuel, hydraulic and pneumatic systems not for vehicles; tube lines and industrial hose lines for use with fuel, hydraulic and pneumatic systems not for vehicles; metal fittings for joining tubes and hoses in the nature of metal threaded fasteners, end caps for tubes and hoses not for vehicles; structural joint connectors of metal, namely, push-in connectors, plug-in connectors, and screw connectors; couplings for use with fuel, hydraulic and pneumatic s...