Streamline Collar Shaft Anode with Allen Wrench, Aluminum, 40mm Shaft
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Sea Shield Marine Streamline Collar Shaft Anode with Allen Wrench, Aluminum, 40mm Shaft
Engineered for metric 40mm propeller shafts found on European and imported vessels, the Sea Shield Marine SL-40MM-ALU-W/A Streamline Collar Shaft Anode delivers premium cathodic protection with the hydrodynamic efficiency that performance-focused mariners expect. The streamline (football-shaped) profile minimizes drag and turbulence compared to traditional collar designs, preserving speed and fuel economy while providing full sacrificial protection. Die-cast from military specification MIL-A-24779 compliant aluminum alloy, this anode is formulated for salt and brackish water use, offering longer service life and a more environmentally responsible alternative to zinc.
Precision internal sizing for 40mm shafts maximizes metal contact for consistent, even cathodic protection across the entire shaft surface. Captive Allen Head fasteners with threads tapped into the anode body make underwater installation clean and reliable; lock washers prevent loosening under vibration. The included Allen wrench provides a complete, ready-to-install solution—no separate tool purchase required.
Size markings are visible inside and outside the collar for quick identification. Manufactured in California, USA. Replace when approximately half of the anode has been consumed.
Key Features
- Aluminum
- Mil-Spec: MIL-A-24779
- For use in: Salt Water, Brackish Water
- Shaft Diameter: 40mm
- Includes: Anode, Allen Wrench
- Made in: USA
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