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About Us

Oklahoma Specialties, Inc. (OSI) has been meeting forging needs with superior quality for over twenty years. OSI has been a chief manufacturer of hot forged transition nozzles (also known as a “swage”) for box headers on air coolers since 1996.

A transition nozzle allows the width of the header to be shortened. By doing so it saves money in material, consumables and in time welding. The other advantage in using a transition nozzle is that they allow for a much smoother flow in and out of the header which in some cases help’s the corrosion rate of the material.



Our unique procedures and quality control are held to high standards to ensure the integrity and longevity of all parts manufactured. 




Forging Success, Extruding Quality 

        Manufacturing Perfection 

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