AW Rod Thread : A thread for tools and equipment that has three parallel threads per inch (similar to a BW thread). Used in applications of 1.75" OD thread or less
George E. King Engineering, 5000 Oilfield Terms: A Glossary of Petroleum Engineering Terms, Abbreviations and Acronyms, US 2010. http://gekengineering.com/Downloads/Free_Downloads /Glossary_of_Petroleum_Engineering_Terms_25_August _2010.pdf, (Oil - Amer) {593}