Hydraulic hose plug and cap assortment used to ensure secure and leak-proof connections of hose and tube system maintenance; Kit consisting of steel plugs and caps in the nature of adapter fittings for industrial equipment; Metal pipe fittings; Metal hose fittings; Metal joinery fittings; Metal plug; Metal tubes and pipes; Metal tube, pipe, and hose fittings, couplings and connectors, for use in hydraulic systems, namely, plugs, seals, o-rings, flanges, swivels, swivel adapters, swivel ends, ...