PROPELLER LOCK 74058
Mercruiser SSM
Thread Size:1-14
Hex Size:1-7/16
Overall Length:1.37
The best protection available against costly propeller theft. Once installed the McGard propeller lock offers 24 hour protection during use, storage and transit. A free-spinning collar will turn if attacked by gripping tools without loosening the lock. Constructed of naval brass and hardened stainless steel for maximum security.