api 5000Our ring joint gaskets are strictly manufactured as per API-6A and ASME B16.20 specification. RX Series are available in low carbon steel and 316 stainless steel. RX Series ring joint gasketsAPI Specification 6A covers wellhead and tree equipment as follows: API Specification 6A Wellhead Equipment Valves, Chokes, and Actuators Plugs, Connectors, and Gaskets Other