Airtight special thread

A gas-tight thread connection comprising an internal thread and a matching female thread
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It is characterized in that the surface of the thread is provided with a non-uniform sealing (coating) layer, which comprises a thick sealing (coating) layer arranged at the thread gap and a conventional gladiator coating (coating) layer located at the non-gap.
This kind of non-uniform sealing plating (coating) layer is not only convenient to process, but also has no special requirements for the thread itself processing, so it is suitable for mass production, and the production cost is low, and easy to control the thickness of the plating (coating) layer, to ensure the air tightness requirements of the thread connection.
The air tightness can reach 80MPa, and the temperature resistance can reach 350℃.