JIS (Japanese Industrial Standards) fittings are a type of hydraulic fitting that conforms to the JIS B2351 standard. JIS fittings are commonly used in Japan and other parts of Asia, as well as in industries that follow Japanese standards.

JIS fittings have a 30-degree flare seat that matches the JIS tapered pipe thread, which allows for a secure and leak-free connection. They are available in various materials such as steel, stainless steel, and brass, and can be used with a range of hose sizes.

JIS fittings are often used in hydraulic applications such as oil and gas, construction equipment, and industrial machinery. They are designed to handle high-pressure hydraulic systems and are known for their durability and reliability.