Martyr CMPNZC Zinc Prop Nut Anode – Series C | Saltwater
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Martyr CMPNZC Zinc Prop Nut Anode – Series C
A zinc sacrificial anode designed to replace the prop nut anode on inboard propeller shafts. The prop nut anode sits at the aft end of the shaft, protecting the propeller nut, shaft threads, and adjacent running gear from galvanic corrosion. The Series C designation refers to a specific prop nut geometry — confirm your existing prop nut style matches Series C before ordering.
Compatible Applications
- Inboard propeller shafts with Series C prop nut configuration
- Saltwater use
- Direct replacement for worn or depleted Series C prop nut anodes
- Confirm prop nut style and thread pattern before ordering
Specifications
- Part Number: CMPNZC
- SKU: 194-CMPNZC
- Material: Military-grade zinc alloy (sacrificial)
- Series: C
- Best For: Saltwater
- Weight: ~80 g
Other Series – Zinc Prop Nut Anodes
- CMT-PNZA – Zinc Prop Nut Anode, Style A
- CMT-PNZB – Zinc Prop Nut Anode, Style B
- CMT-PNZC – Zinc Prop Nut Anode, Style C
- CMPNZB – Zinc Prop Nut Anode, Series B
- CMPNZD – Zinc Prop Nut Anode, Series D
- CMPNZH – Zinc Prop Nut Anode, Series H
- CMT-PNZH – Zinc Prop Nut Anode, H Style
- CMT-PNZF – Zinc Prop Nut Anode, F Style
Parts Desk Insights
The prop nut anode is one of the most overlooked anodes on an inboard vessel — it’s small, easy to miss at haulout, and often left in place long past the point where it’s providing meaningful protection. A depleted prop nut anode leaves the shaft threads and propeller nut exposed to galvanic attack, which can make future prop removal significantly harder and lead to corrosion damage on the shaft itself.
The most important step before ordering is confirming your prop nut style. Martyr’s lettered series (A, B, C, D, F, H) correspond to different prop nut geometries — the wrong series won’t fit correctly and won’t make proper electrical contact. If you’re unsure of your series, bring the old anode or the prop nut itself to a marine dealer for comparison before ordering.
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.