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Harken 16mm Single Swivel Block - 417


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The 16 mm is the smallest block by Harken and is ideally suited for small synthetic control lines found on high-tech dinghies. Stainless steel balls in a captive grooved race and has a 250 lb (113 kg) maximum working load. 16mm sheave for use with 5mm line.

  • lightweight
  • very compact
  • stainless steel ball bearings run in a captive grooved race
  • very high maximum working load

Ideally suited for dinghy control lines, big boat leech lines, downhauls, traveler controls, out hauls, cunninghams and halyards.


  • Sheave diameter: 16mm
  • Length: 46mm
  • Weight: 18g
  • Maximum line diameter: 5mm
  • Maximum working load: 113kg
  • Breaking load: 339kg
  • Model: 16mm Single Swivel Block
  • Manufactured by: Harken

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