The plug is a modified 55A1 attachable designed to accommodate a special backshell which has a hose barb and oil fill port. The part number becomes 55P1-XXXX-0000.
For special extreme applications, a JIC type fitting is available on the backshell. This makes it possible to use a hydraulic hose instead of clear tubing. PBOF connectors may be ordered separately or made up as cable assemblies. Due to the difficulty of shipping cable assemblies with oil, we leave that to the customer.