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Harken 40mm Carbo Double Swivel Becket Block

Cat.No:  8620 Sup. No:  HK2639

Availability: In stock

RRP: $143.41

our price $124.95
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Carbo AirBlocks® are 60% stronger and 30% lighter than Harken's classic blocks. Use the 40 mm Carbo for jib and mainsheet systems on high-performance dinghies and for loaded control lines on small keelboats.

The nylon-resin sideplates are densely packed with long-glass fibers for a compact block with a high strength-to-weight ratio. Sheaves spin on high-load ball bearings with fitted races for low-friction operation.

Ball bearings, sheave and sideplates UV stabilized with black additive for maximum protection.

Used for

  • Main/jib sheets
  • Mainsheet fine-tune
  • Control lines
  • Vangs
  • Cunninghams
  • Outhauls


  • Sheave: 40mm
  • Length: 110mm
  • Weight with shackle: 90g
  • Shackle pin: 5mm
  • Max line: 10mm
  • Safe working load: 440kg
  • Breaking strength: 1080kg



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