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Cylindrical zinc rudder anode with stainless steel hex nut and socket cap screw

Tecnoseal

Tecnoseal R4 Rudder Anode Zinc 5" marine electronic

SKU CH-ATDT-K3AJ0

Zinc rudder anode protects underwater metal from galvanic corrosion and includes a captive stainless hex nut for easier submerged fitting

  • Zinc alloy protects rudder from galvanic corrosion
  • 5 inch diameter fits standard rudder shafts
  • Captive stainless hex nut simplifies underwater installation
  • Includes socket cap screw for secure mounting

Tecnoseal R4 Rudder Anode Zinc 5

The Tecnoseal R4 is a zinc rudder anode with a 5-inch outer diameter designed for cathodic protection on marine vessels. It includes a captive stainless-steel hex nut and socket cap screw to simplify underwater installation and secure retention. Suitable for boat owners and marine technicians fitting sacrificial anodes to rudder assemblies.

Full-size weight and captive hardware

The anode is supplied at full size and weight to provide maximum protective life before replacement is required. Its captive hex nut prevents loss of fasteners during submerged fitting, reducing installation time and the risk of dropped components. No thermal, noise or power-draw characteristics apply to this passive corrosion-protection component.

How it compares

Measured against everything we stock in Boat Audio & Electronics, at today’s prices. Recalculated every night.

Price $21.99
Cheaper than about 80% of the 312 comparable items (median $69.49).

Specifications

No published specifications for this item yet.

Questions about this item

How do I install the 5" zinc rudder anode, and what step is often missed?

Slide the anode onto the rudder stock, align the captive hex nut, then tighten the socket cap screw; the step often missed is confirming the captive nut seats fully before final torque.

When will this zinc anode need replacement?

Replace it once roughly half of the 5" zinc mass has corroded away; inspection every haul-out or annually is typical for saltwater use.

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