What is o-ring boss?

O-ring boss (ORB) is a type of fitting that is commonly used in hydraulic systems. It consists of a male and a female component, with the male component featuring a straight thread with an o-ring groove, and the female component designed with a chamfered opening to accommodate the o-ring. When the two components are fully tightened, the o-ring is compressed between them, creating a tight and leak-free seal.

The ORB fitting is preferred in hydraulic systems that operate at high pressure and high vibration, where a robust and reliable sealing mechanism is necessary. It also allows for quick and easy installation, requiring only minimal torque to achieve a secure connection. The ORB fitting is widely used in the aerospace, oil and gas, and automotive industries, among others.

However, it is important to note that ORB fittings are not compatible with other types of fittings, and mixing them can result in leakage and system failure. It is also crucial to ensure that the o-ring used in the fitting is made of a material that is compatible with the fluids and operating conditions of the hydraulic system.