Overbore Flanges

See our selection of standard Overbore Flanges at API International, Inc. These Overbore Flanges are AWWA Class #150, with AWWA Class #300 available upon request. Our machine shop allows us to Overbore many different types of flanges. If you do not see the Overbore flanges required for your project below, contact our sales team and we can help you find the product you need!