This saildrive locking plate is used on Volvo Penta saildrive units equipped with a fixed propeller . The locking plate secures the propeller cone bolt and prevents it from loosening during operation. The locking plate is installed in the propeller cone assembly and ensures the bolt remains securely fixed under load and vibration. This is a genuine Volvo Penta OEM part . Volvo Penta OEM Number 23680979 Product Information Used for saildrives with fixed propeller Installed in the propeller cone assembly Prevents loosening of the cone bolt Part number 10 in the parts drawing Compatible Volvo Penta Saildrives 110S 120S 130S 150S MS25S Questions about compatibility or saildrive parts? Our marine specialists are happy to help.