Harken Carbo double block
Harken Harken sailboat hardware
  • Harken Carbo double block

Harken 57mm Carbo Double Swivel Block

The Harken 2602 double Carbo AirBlock has 2-1/4 inch diameter sheaves and a shackle that swivels to prevent line twist. Carbo AirBlocks are 60 percent stronger and 30 percent lighter than Harken Classic blocks.

High-load 57 mm Carbo has a broad working range. Use for main and jib sheets on centerboard and keelboats like Lightnings, Dragons, Solings, J/24s and for mainsheet systems on catamarans.

$86.49 / ea
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Tech Spec Product Info User Generated Content



2602 Block

Sheave diameter  2-1/4 inch 
Length  4-3/4 inch 
Weight w/ shackle  6.3 oz 
Shackle pin diameter  6 mm 
Max. line Diameter  7/16 inch 
Safe Working Load  1584 lbs 
Breaking Strength  3300 lbs 


  • Curved bearing race fit ball for more ball-to-race contact. Disperses load for higher strength, smaller block
  • AirBlock design with high-tech, long-glass fibers and nylon material for high strength-to-weight ratio
  • Eliminates heavy stainless sideplates


BRAND: Harken
Type: Blocks and Sheaves
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