Zinc Hull Plate Anode 4-5/8" x 2-1/2" CMT-ZHC2AZ
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The CMT-ZHC2AZ (Martyr CMZHC2AZ) is a compact bolt-on zinc hull plate anode designed to protect underwater hull surfaces and bonded metal components from galvanic corrosion. Mounted directly to the hull, it acts as a sacrificial metal—corroding first to preserve more valuable structural parts.
Its low-profile rectangular design provides effective protection while minimizing drag, making it ideal for smaller vessels or secondary protection zones.
Key Features
- Marine-grade zinc construction (ideal for saltwater use)
- Compact, streamlined plate design
- Bolt-on installation
- High-purity zinc for consistent corrosion protection
- Suitable for smaller hull areas or supplemental protection
Specifications
- Length: ~4-5/8" (146 mm)
- Width: ~2-1/2" – 2-5/8"
- Thickness: ~3/4"
- Hole spacing: ~2-7/8" center-to-center
- Weight: ~2 lbs
Application
Used for:
- Hull protection below the waterline
- Transoms and smaller bonding zones
- Supplemental anode coverage on larger boats
✔ Common on:
- Fiberglass and aluminum boats
- Trawlers and cruisers
- Boats requiring distributed anode coverage
Serial Number / Fitment Notice
Always confirm:
- Mounting hole spacing
- Required anode size for vessel
- Material suitability (zinc for saltwater only)
When This Part Needs Replacement
- Anode is 50% consumed or more
- Uneven corrosion or heavy pitting
- Annual inspection / haul-out
- Loss of protective mass
Installation Notes
- Install on clean, bare metal surface
- Ensure proper electrical bonding
- Do not paint anode
- Use correct bolt size and backing if required
- Install multiple units if needed for full coverage
Alternate / Cross-Reference Part Numbers
- Martyr: CMZHC2AZ
- Common reference: ZHC-2
- Aluminum version: CMZHC2AA
- Magnesium version: CMZHC2AM
Parts Desk Insight
This is a mid-size hull anode often used where a full-size plate is too large. It’s commonly installed in multiples to create balanced corrosion protection across the hull, especially on boats with multiple bonded metal components.
Shipping
Shipping: Ships same or next day for fast Canada wide shipping. ⚓
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.