One-Piece Sucker Rod : A rod whose body and pin or box ends are an integral unit. The ends may be formed by forging the ends of a one-piece body stock or by welding or fusing end pieces on the body. (Spec 11B)
The Mudblogger (Oilfield, Energy and Related Photographs), Oil Field Glossary, TX, USA 2014. http://mudblogger.com/oilfield-glossary/, (Oil - Amer) {777}