Aluminum Hull Anode 4" Style B Round 1/2" Hole CMT-H2B4375GA
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
The CMT-H2B4375GA is a 4" round Style B aluminum hull anode with a 1/2" center mounting hole, designed to protect bonded underwater metals from galvanic corrosion. This bolt-on style anode provides reliable protection for hull fittings, struts, and other submerged components.
Manufactured from marine-grade aluminum alloy, it offers extended lifespan and consistent performance in saltwater and brackish environments compared to traditional zinc anodes.
Key Features
- 4" round Style B hull anode
- 1/2" center mounting hole
- Marine-grade aluminum alloy construction
- Bolt-on design for easy installation
- Protects hull hardware and bonded systems
- Longer lasting vs zinc in mixed water conditions
Application / Compatibility
Designed for:
- Hull-mounted corrosion protection
- Thru-hull fittings
- Struts and underwater hardware
✔ Common on inboard and sterndrive vessels
✔ Ideal for saltwater and brackish water use
Serial Number / Fitment Notice
Always confirm:
- Diameter (4")
- Mounting hole size (1/2")
- Mounting location and clearance
Proper sizing and placement are critical for effective corrosion protection.
When This Part Needs Replacement
- Anode is 50% or more consumed
- Uneven or accelerated corrosion
- Loss of bonding effectiveness
- Routine haul-out inspection
Installation Notes
- Install on clean, bare metal surface
- Ensure solid electrical contact
- Do not paint the anode
- Tighten securely to prevent movement
Alternate / Cross-Reference Part Numbers
- Camp Company: CMT-H2B4375GA
- Martyr: H2B4375GA
- Zinc equivalent: H2B4375GZ
Parts Desk Insight
Round “Style B” anodes are a simple, reliable bolt-on solution when you don’t need a strap or weld-on setup. They’re commonly used where space is limited or a centered mounting point is preferred over elongated plate styles.
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.