Minimum flow restriction Heavy duty hex head style ball loading plug Grease retainer ring (ensures clean ball race) Standard packing units (operating temperature to 225 °F) Superior hardened ball races ensure uniform surface hardness and depth for longer life under severe thrust and radial loading Standard Swivel Joints are provided with API line pipe threads Other end connections are available on request Available for standard and sour service All sizes are available in 8 styles, for 360 rotation in 1, 2 or 3 planes