A JIC fittings chart displays the corresponding size and number of threads for each JIC 37-degree hydraulic fitting. The fitting chart also indicates the shoulder width and diameter, fitting length, bore diameter, and tip diameter. The sizes on the charts are usually in inches.
JIC fittings are a common connection in fluid-power applications, especially in situations involving pressures up to 10,000 pounds per square inch. These flare fittings feature a seating surface manufactured with a 37-degree flare. This flaring allows the fitting to achieve a seal through the metal-to-metal contact created when the fitting nose screws firmly against the flared tubing. This makes the chart an important tool for finding the fitting size required to achieve the desired seal.