CMP CMX01 Streamlined Shaft Zinc Anode 3/4 Inch - Marine Sacrificial Shaft Zinc

The CMP CMX01 is a zinc sacrificial shaft anode engineered to provide reliable cathodic protection for marine propeller shafts in saltwater environments. Manufactured by Canada Metal Pacific (CMP) — the maker of Martyr Anodes — this streamlined anode is precision die-cast from high-purity zinc alloy to meet demanding marine corrosion protection requirements.

The low-profile, hydrodynamic body wraps cleanly around the shaft to minimize drag and turbulence, helping maintain vessel speed and efficiency. The two-piece design features interlocking halves that clamp together securely, ensuring consistent metal-to-metal contact with the shaft for maximum galvanic protection. Slotted stainless steel hardware and red plastic retaining washers are included, keeping fasteners captive and simplifying underwater installation.

Key Features:

• Material: High-purity zinc alloy — rated for saltwater use
• Inner Diameter: 3/4 inch (0.75 in) — fits standard 3/4-inch propeller shafts
• Outer Diameter: 2.04 inches
• Height: 2 inches
• Interlocking two-piece halves for full shaft contact and a secure, snug fit
• Streamlined profile reduces hydrodynamic drag and turbulence
• Slotted stainless steel hardware included for easy installation with a standard flathead screwdriver
• Red plastic retaining washers prevent screws from dropping during installation
• Protects shafts, shaft brackets, rudders, struts, and surrounding underwater hardware from galvanic corrosion
• For use in saltwater only — zinc alloy is not recommended for fresh water applications

As a sacrificial anode, the CMX01 corrodes preferentially in place of your boat's more critical metal components, dramatically extending the service life of shafts, propellers, and underwater hardware. Regular replacement as part of your seasonal maintenance routine keeps your vessel protected from costly galvanic damage.