Stuffing Box 3 : A packing gland; a chamber or "box" to hold packing material around a moving pump rod, valve stem or wireline to prevent the escape of gas or liquid. (ITOGP)
The Mudblogger (Oilfield, Energy and Related Photographs), Oil Field Glossary, TX, USA 2014. http://mudblogger.com/oilfield-glossary/, (Oil - Amer) {777}