A pressure containing fitting with a minimum of four openings. Usually all four openings are at 90o to one another. Crosses may be threaded or flanged (also studded flange). (Spec 6A)
The Mudblogger (Oilfield, Energy and Related Photographs), Oil Field Glossary, TX, USA 2014. http://mudblogger.com/oilfield-glossary/, (Oil - Amer) {777}