Hydraulics systems ORFS 90 degree elbow hose connector with internal thread. Steel and sturdy connector for all hydraulic hose assemblies. These connectors have a UN thread level with sealing. This connector requires a 90 Shore o-ring all the way to the outer thread of the connector. The o-ring in question should be replaced every time the connector needs to be replaced. Due to its structure, the connector is easy to thread. This nipple is available in many different sizes. If choosing the right size or connector causes difficulties, we will help you quickly in the chat and by phone. The thread table of orfs connectors below shows the exact thread of the un connector.