Martyr Zinc Propeller Shaft Anode 28mm

SKU: CM4-112

Sale price$29.95


Imperial shaft sizes, comes complete with s/s bolts and nuts to fasten to your shaft (socket cap)

  • Shaft Dia: 1 1/8"
  • Length: 2 1/8"
  • Weight: 0.41kg
  • Bolts: 2
  • 100% circular radius
  • Interlocking halves
  • Extra alloy around fastener

Martyr anodes are pressure diecast and manufactured to strict quality standards through an ISO9001 Quality Management System.

In addition, each alloy is guaranteed to be manufactured to the latest US Military Alloy specification and is chemically tested regularly in Martyr's in-house labs to ensure consistency.


  • For use in saltwater
  • Not recommended for fresh water
  • Alloy is manufactured to meet or exceed Military specification MIL-A-18001K
  • ISO9001 standards

Composition Zinc Alloy

  • Cadmium: 0.025%-0.07%
  • Copper: 0.005%max
  • Cadmium: 0.025%-0.07%
  • Iron: 0.005%max
  • Lead: 0.006%max
  • Aluminium: 0.1%-0.5%
  • Zinc**: Remainder
    ** Martyr anodes have a zinc purity 99.995%

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