ORFS: These fittings can be disassembled and reassembles many times, can replace the O ring and tighten it to the recommended torque. O-Ring Faced Seal Fittings works well for both fluid and gases and are easy to be installed. They are used assembled on the high vibration lines and systems due to its capability to absorb shock because of its soft sealing nature. They meet the specifications of SAE J1453-1, 2, 3.