Zinc Propeller Nut Anode B – CMT-PNZB
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
The Martyr CMT-PNZB is a zinc replacement propeller nut anode in the B-style pattern, designed to help protect propeller shafts and propellers from galvanic corrosion in saltwater service. Current product references identify it as the replacement anode only, not a complete assembled prop nut kit.
Key Features
Martyr part number: CMT-PNZB / CMPNZB. It is a zinc sacrificial propeller nut replacement anode for the B-style pattern and is intended for saltwater use. Current pattern references commonly associate the B replacement with 7/8 in. shaft applications.
Application / Compatibility
Suitable where a B-style replacement prop nut zinc is required. The safest match points are the existing prop nut style, shaft size, and replacement-anode pattern rather than appearance alone. Current zinc pattern references place the B replacement in the 7/8 in. shaft-size group.
Fitment Notice
Fitment should be confirmed by the installed prop nut assembly and replacement-anode pattern before ordering. Matching by CMT-PNZB / CMPNZB / PN-B-ZN remains the safest method.
When This Part Needs Replacement
Replace the anode when it is heavily wasted, pitted, cracked, loose, or significantly reduced in size. As a zinc anode, this version is intended for saltwater use and is not recommended for freshwater service.
Installation Notes
Current B-style replacement references indicate the mounting screw is sold separately on comparable pattern listings. Replacement prop nut guidance also notes the nylon patch is good for one initial application only, and thread retention should be confirmed during installation. Install on a clean contact surface and do not paint the anode.
Alternate / Superseded Part Numbers when applicable
CMT-PNZB
CMPNZB
PN-B-ZN
2539
BB
PROPNUT-B
PROPNUTB
Parts Desk Insight
The important detail on this part is that it is the replacement anode for the B-style prop nut system, not the full complete assembly. Matching the installed prop nut style first is the best way to avoid ordering the wrong replacement zinc.
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.