My Account
Shopping Cart

Martyr Anodes CMPNAH Replacement Prop Nut Anode Aluminum Series H

Manufacturer

Martyr Anodes

<h3>About Martyr Anodes</h3><p>When it comes to defending a vessel against galvanic corrosion, few names carry the authority of <strong>Martyr Anodes</strong>. A flagship brand within the <strong>CMP Group</strong>, Martyr has its roots in foundry operations that date back to the early 1900s in Vancouver, BC, growing from a local manufacturer into a globally recognized leader in marine cathodic protection. Today, the brand supplies boaters, commercial operators, and marine professionals worldwide with sacrificial anodes engineered to guard hulls, propellers, rudders, shafts, engines, and other submerged components from the relentless effects of corrosion.</p><h3>Three Alloys, Every Water Type</h3><p>What sets Martyr apart from competing anode manufacturers is its position as the only brand to offer all three protective alloys — zinc, aluminum, and magnesium — under a single product line. This matters because the correct alloy depends entirely on the water environment a vessel operates in. Zinc anodes are the classic choice for aggressive saltwater conditions, while aluminum anodes are preferred for saltwater and brackish environments, offering superior corrosion resistance with a reduced environmental footprint. Magnesium anodes are the go-to solution for freshwater use, delivering effective sacrificial protection without degrading too quickly. Whatever the operating environment, Martyr has an engineered solution to match.</p><h3>Military-Grade Manufacturing Standards</h3><p>Martyr does not cut corners on metallurgy. Every anode is pressure die-cast and manufactured to meet or exceed <strong>U.S. Military alloy specifications</strong>, using only high-purity metals. Each alloy batch is lab-tested with full certification and traceability available upon request. This rigorous quality management — operating under an ISO 9001 framework — ensures that each anode delivers consistent, long-lasting galvanic performance across a wide range of marine environments, from recreational pleasure craft to commercial vessels and naval applications.</p><h3>Anode Kits for Simplified Protection</h3><p>For boaters who want a complete, hassle-free maintenance solution, Martyr&rsquo;s <a href="/7452-martyr-anodes-anode-kits-200102">Anode Kits</a> offer pre-packaged sets engineered for specific engine models and boat types. Compatible with major marine engine brands including Yamaha, Mercury, Volvo, and MerCruiser, these kits take the guesswork out of corrosion protection and ensure every critical system receives optimal coverage in a single purchase.</p><h3>Sustainability at the Core</h3><p>Martyr and the CMP Group have made environmental stewardship a cornerstone of their mission. Traditional zinc anodes can contain cadmium, a metal that poses risks to aquatic ecosystems. Martyr actively advocates for the adoption of aluminum and magnesium alternatives that deliver equal or superior protection while minimizing harm to marine environments — embodying the brand&rsquo;s philosophy of &ldquo;Protect your boat, protect our waters.&rdquo; With over 1,000 anode types available and a catalog that fits virtually every major marine engine and boat model, Martyr remains one of the most comprehensive and trusted sources for marine corrosion protection in the world.</p>

Part Number

CMPNAH
06/03/2036 8:37 AM
Sale Price

$33.51

In Stock (9)

delivery box

Usually delivered within 2 days

Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Martyr Anodes CMPNAH is a replacement propeller nut anode designed to provide corrosion protection for your outboard or sterndrive propeller assembly. This aluminum anode is part of the Series H product line and threads directly onto the propeller shaft, protecting the prop, shaft, and lower unit from galvanic corrosion in saltwater and brackish water environments.

Key Features:

  • Aluminum alloy construction for optimal protection in saltwater applications
  • Series H configuration for compatibility with specific prop shaft sizes
  • Sacrificial anode design protects more expensive metal components
  • Direct replacement for worn or depleted prop nut anodes
  • Easy installation threads directly onto propeller shaft

Martyr Anodes are manufactured to military specification alloy standards, ensuring consistent performance and reliable corrosion protection. Regular inspection and replacement of sacrificial anodes is essential for maintaining the longevity of your marine drive components. Replace this anode when it has deteriorated by approximately 50% or shows signs of heavy corrosion.

So far so good . will see how fast shipping is .

easy, smooth transaction. Reasonably priced item. I was hesitant when reading some negative reviews, but took a chance anyway. I'm glad that I did. Item quickly received; no problems. Will buy from again.

Utilized customer support for question on particular item. Phone answered immediately, consultant answered questions and I was able to place order immediately. This second purchase was due to the initial experience. Will make future purchases from Autoplicity.

did not see if delivery would be Wed July 22?

Good products for good prices

This website is very easy to shop on, it is easy to pay with amazon

I was looking to buy a gale banks header for my jeep. I came across this site th eir price was nearly $100 cheaper than any one else. Fast shipping too. Thank you.

Everything went smoothly

I REALLY NEEDED THE PARTS ORDERED AND ORDERING WAS EASY, BUT I FOUND WHAT I NEEDED AND CANCELED THE ORDER...

Good. Easy to find this site on Google for my truck part.

Great prices. They sent what I ordered and it was what I expected. I would shop with them again.

Share icon
Return Policy
Returns are easy at Boatplicity

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy