What is the angle of a JIC thread?

The angle of a JIC (Joint Industry Council) thread is 60 degrees. This specification is part of the design for the threads used in hydraulic fittings and similar applications, which ensures a proper seal when the fittings are tightened. The 60-degree angle is optimal for this purpose as it allows for a tight connection that can handle high-pressure fluids, maintaining the integrity and performance of hydraulic systems.

In contrast, other thread angles, such as 45 degrees or 90 degrees, do not provide the same level of sealing or structural integrity necessary for hydraulic applications. The 75-degree angle is also not used in standard thread designs and would not effectively achieve the necessary fit and pressure handling required in joints designed for hydraulic systems. Understanding the specific angles used in different thread types is crucial for selecting the right fittings for various mechanical and hydraulic applications.