SCHOTTEL OEM rotary shaft seal (radial lip seal / Simmerring) for the propulsion driveline. Used at shaft penetrations of the SRP / STP / SPJ housing to retain lubricating oil while excluding seawater and contamination. The seal lip rides on a hardened/ground shaft surface; replace whenever the gear or coupling is opened. Note: this part number identifies the SCHOTTEL part family. The exact dimensional or material specification on the as-supplied part may require confirmation against the vessel serial number and equipment data plate — confirm with the vessel's SCHOTTEL service file before final order.