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Harken 40mm Carbo Single Swivel Block

Cat.No:  8612 Sup. No:  HK2637

Availability: In stock

RRP: $68.00

our price $62.95
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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: 102mm
  • Weight with shackle: 48g
  • Shackle pin: 4mm
  • Max line: 10mm
  • Safe working load: 220kg
  • Breaking strength: 735kg



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