Straight Male ORB (O-ring Boss) hydraulic adapters are designed to provide leak-free connections in medium to high-pressure hydraulic systems. They feature a straight thread with a 90 Durometer O-ring that seals the connection when compressed against a smooth, flat surface in the female port. This design offers superior sealing performance, especially in systems that require reliable pressure containment. ORB fittings are commonly made from carbon, nickel-plated carbon, or stainless steel and are highly reusable due to their replaceable O-ring. While ORB fittings are easy to maintain and available in various sizes and materials, they do have some limitations, such as temperature sensitivity based on O-ring material and potential installation issues. Unlike other fittings, ORB connections should not be mixed with NPT or JIC connectors to avoid leaks, making it essential to correctly identify and match the appropriate fittings for a secure, leak-resistant seal.