United States Fittings™ manufactures custom pipe fittings from carbon steel, stainless steel & aluminum. With our large manufacturing capacity, we provide custom pipe fittings to the world's most demanding industries. Made in the USA, our product line includes custom laterals, crosses, true wyes, tees, shaped-nipples, and stub end pipe fittings. Our technically skilled staff can provide custom design and testing including radiographic, mag particle and die penetrant to meet your acceptance requirements.