---
product_id: 90981032
title: "Martyr Anodes, CMR03AL, Aluminum Rudder & Trim Tab Anode with Allen Screw – Marine Boat Sacrificial Anode for Saltwater & Brackish Corrosion Protection"
brand: "martyr"
price: "23207CFA"
currency: XOF
in_stock: true
category: "Martyr"
url: https://www.desertcart.sn/products/90981032-martyr-anodes-cmr03al-aluminum-rudder-and-trim-tab-anode-allen
store_origin: SN
region: Senegal
---

# Secure Allen screw fastener included ISO 9001 certified precision diecast Triple alloy options for tailored corrosion defense Martyr Anodes, CMR03AL, Aluminum Rudder & Trim Tab Anode with Allen Screw – Marine Boat Sacrificial Anode for Saltwater & Brackish Corrosion Protection

**Brand:** martyr
**Price:** 23207CFA
**Availability:** ✅ In Stock

## Summary

> 🛥️ Sail Smarter, Not Harder: Corrosion Protection That Works as Hard as You Do

## Quick Answers

- **What is this?** Martyr Anodes, CMR03AL, Aluminum Rudder & Trim Tab Anode with Allen Screw – Marine Boat Sacrificial Anode for Saltwater & Brackish Corrosion Protection by martyr
- **How much does it cost?** 23207CFA with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/products/90981032-martyr-anodes-cmr03al-aluminum-rudder-and-trim-tab-anode-allen)

## Best For

- martyr enthusiasts

## Why This Product

- Trusted martyr brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Effortless Installation with Allen Screw:** Designed for quick, secure mounting so you spend less time maintaining and more time sailing.
- • **Precision Engineered for Ultimate Durability:** Crafted under strict ISO 9001 standards ensuring flawless quality and long-lasting protection.
- • **Tailored Alloy Protection for Every Water Type:** Choose from Zinc, Aluminum, or Magnesium alloys to match saltwater, brackish, or freshwater environments perfectly.
- • **Trusted by Professionals, Loved by Enthusiasts:** Ranked #37 in Sailing Hardware with a stellar 4.6-star rating from 155+ users—join the elite fleet safeguarding their boats.
- • **Maximize Vessel Longevity with Sacrificial Anode Tech:** Protect your investment by preventing costly corrosion on rudders and trim tabs.

## Overview

The Martyr CMR03AL Aluminum Rudder & Trim Tab Anode is a premium marine sacrificial anode designed to protect boats from corrosion in saltwater and brackish environments. Manufactured with precision diecasting under ISO 9001 standards, it offers superior alloy purity and comes with an Allen screw for secure installation. Available in three alloy types to suit different water conditions, it ensures optimal cathodic protection for iron, steel, aluminum, and magnesium components, extending vessel life and performance.

## Description

Buy Martyr Anodes, CMR03AL, Aluminum Rudder & Trim Tab Anode with Allen Screw – Marine Boat Sacrificial Anode for Saltwater & Brackish Corrosion Protection: Hardware - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

## Features

- High-quality Martyr anodes are pressure diecast and manufactured to strict quality standards through an ISO 9001 Quality Management System
- Martyr anodes offer maximum protection by maintaining quality alloys, free from impurities like iron, which can compromise performance
- Three alloys available - Use Zinc (Martyr I) for salt water, Aluminum (Martyr II) for brackish water, or Magnesium (Martyr III) in fresh water.
- Use alternative anode alloys when changing water conditions
- Provides low cost cathodic protection of ocean-going vessels, structures and equipment constructed of iron, steel, aluminum, magnesium, and other metals

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B003E1UHOQ |
| Best Sellers Rank | #114,095 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #37 in Sailing Hardware |
| Brand | MARTYR |
| Color | silver |
| Compatible Groove Diameter | 3.75 Inches |
| Customer Reviews | 4.6 out of 5 stars 155 Reviews |
| Drive System | "" |
| Exterior Finish | Zinc |
| Fastener Size | 5/16'' x 1-1/2'' |
| Fastener Type | Screw |
| Finish Types | Uncoated |
| Global Trade Identification Number | 00628309127855 |
| Head Style | Trim |
| Head Type | Flat |
| Included Components | Aluminum Rudder / Trim Tab Anode with Allen Screw |
| Item Diameter | 3.75 Inches |
| Item Dimensions | 11.63 x 7 x 5 inches |
| Item Weight | 8.96 ounces |
| Item dimensions L x W x H | 11.63 x 7 x 5 inches |
| Manufacturer | Martyr |
| Material | Aluminum |
| Material Type | Aluminum |
| Maximum Shear Strength | 2,700 psi |
| Metal Type | Aluminum |
| Model | CMR03AL |
| Number Of Items | 1 |
| Number of Pieces | 1 |
| Part Number | CMR03AL |
| Point Style | Hex Point |
| Screw Head Style | Trim |
| Screw Point Style | Hex Point |
| Set Screw Thread Type | UNC or UNF |
| Size Name | 0.5" x 3.75" x 0.34" |
| Thread Class | 2A |
| Thread Coverage | "" |
| Thread Size | "" |
| Thread Style | "" |
| Thread Type | Unc Or Unf |
| UPC | 628309127855 |
| Unit Count | 1.0 Count |
| Warranty Description | 90 days |

## Product Details

- **Exterior Finish:** Zinc
- **Head Style:** Trim
- **Item dimensions L x W x H:** 11.63 x 7 x 5 inches
- **Material:** Aluminum
- **Thread Size:** ""

## Images

![Martyr Anodes, CMR03AL, Aluminum Rudder & Trim Tab Anode with Allen Screw – Marine Boat Sacrificial Anode for Saltwater & Brackish Corrosion Protection - Image 1](https://m.media-amazon.com/images/I/81EgL799fAL.jpg)

## Frequently Bought Together

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**Shop now:** [https://www.desertcart.sn/products/90981032-martyr-anodes-cmr03al-aluminum-rudder-and-trim-tab-anode-allen](https://www.desertcart.sn/products/90981032-martyr-anodes-cmr03al-aluminum-rudder-and-trim-tab-anode-allen)

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*Product available on Desertcart Senegal*
*Store origin: SN*
*Last updated: 2026-07-12*