Our company can also provide gas seal fasteners similar to New Vam and Vam Top, which make up for the shortcomings of poor sealing performance of common API casing threads and poor tensile, elongation and bending resistance. This button type has the following characteristics: 1. It adopts double sealing of metal cone and metal end face, with good sealing performance. 2. Torque brake shoulder is adopted, with good torque resistance. 3. The thread connection strength is high, reaching the connection strength of API partial ladder buckle. 4. The thread deformation is small, and the anti gluing performance is good. 5. Horizontal streamline design is adopted to reduce energy loss. 6. It is applicable to gas well or directional well.