Profile: H & J Enterprises specializes in industrial supplies. Our services include heat exchanger cleaning, flex-lines re-worked & cleaned, adapters and manifolds, mass spectrometer testing, fittings & valves, and repair kits. We supply metrics, adapters, quick disconnect coupling & fluid conveying products, hydraulic adapters and pipe fittings. We also offer O-ring/gaskets/seals EPDM, neoprene, silicone, O-ring kits, metric O-rings, contoured back-up rings, bonded seals & quad rings.