Martyr CMMZC406 Zinc Hull Plate Anode – 4.4" x 9" | Bolt-On Saltwater Protection
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Martyr CMMZC406 Zinc Hull Plate Anode
A large-format bolt-on zinc hull anode designed to protect steel, aluminum, and fiberglass hulls from galvanic corrosion in saltwater environments. The CMMZC406 mounts flush to the hull and delivers broad sacrificial coverage — ideal for displacement hulls, workboats, and larger recreational vessels where maximum protection area is needed between haulouts.
Specifications
- Part Number: CMMZC406
- SKU: 194-CMMZC406
- Material: Military-grade zinc alloy (sacrificial)
- Dimensions: 4.4" × 9" (approx. 112mm × 229mm)
- Mounting: Bolt-on; hole dimension refers to the center-to-center distance between mounting holes
- Best For: Saltwater use
- Weight: ~1.6 kg
Compatible Applications
- Steel, aluminum, and fiberglass hull plating (saltwater)
- Displacement and semi-displacement hulls
- Commercial workboats and larger recreational vessels
- Any hull requiring a large-format flat plate anode between haulouts
- Suitable where standard teardrop or diver-style anodes are undersized for the vessel's protection requirements
Mounting Notes
The hole dimension listed refers to the center-to-center distance between mounting holes, not the overall anode length. Verify your hull's existing bolt pattern against this measurement before ordering. Mount directly to a clean, bare metal or bonded surface for best electrical contact. Use stainless steel fasteners and ensure the anode makes solid metal-to-metal contact with the hull or bonding system.
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Parts Desk Insights
The CMMZC406 is the right choice when a vessel needs more sacrificial mass than a standard teardrop or diver-style anode can provide — typically on larger displacement hulls, steel workboats, or vessels with extended haulout intervals. The most common mistake with hull plate anodes is ordering by overall size without checking the bolt hole spacing first; always confirm the center-to-center hole dimension matches your hull's existing pattern before ordering. For vessels operating in brackish or mixed-salinity water, consider an aluminum hull anode instead — zinc can passivate in lower-salinity conditions and lose effectiveness.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.