api 5000API Specification 6A covers wellhead and tree equipment as follows: API Specification 6A Wellhead Equipment Valves, Chokes, and Actuators Plugs, Connectors, and Gaskets OtherThe API 5000 system uses the Turbo V™ ion source to produce ions from liquid samples. The Turbo V source can use either the TIS (TurboIonSpray®) probe or the.