What are the seals with SAE external threads in US Thread straight products?

In the series of US Thread straight products, this connection design is not only required to withstand extreme pressure conditions, but also to ensure that fluids (such as hydraulic oil, lubricating oil, etc.) flow without leakage in the system. To achieve this goal, SAE external threads generally use O-rings as seals.
O-rings, as a kind of elastic sealing ring with a circular cross-section, are widely used in various mechanical and fluid systems due to their excellent sealing performance and wide applicability. In the SAE external thread connection of US Thread straight products, the O-ring is carefully placed in a specific sealing groove, which is usually machined at the oil port of the connector body. When two connectors with SAE external threads are connected to each other by rotating the threads, the O-ring will be gradually compressed until it fits tightly on the contact surface of the two connectors.
This compression action not only ensures close contact between the O-ring and the connector surface, but also forms a reliable fluid barrier, effectively preventing fluid leakage in the system. In addition, the selection of O-ring materials is also crucial. It must have good elasticity, wear resistance and corrosion resistance to ensure that its sealing performance can be maintained under extreme working conditions.
This SAE male threaded connector with O-ring seal not only meets international standards such as SAE J514, but also follows the specific provisions of ISO 11926 standard on O-ring sealed connections. These standards not only specify the size, material and performance requirements of O-rings, but also provide detailed guidance on how to properly install and test such sealed connections.