NITTO KOHKI (日東工器株式会社) is a company that engages in the development, manufacture, and sales of fluid couplings, power and machine tools, compressors and pumps, and door-closers. Its key products include CUPLA quick connect couplings, drilling machines, cutters, electric screwdivers, needle scalers, piston type vacuum pumps and compressors, sliding door closers, door hinges, etc. The company serves the new energy, food processing, construction, automotive, electonic devices, and other markets.