carbo airblock
Harken Harken sailboat hardware
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Harken 57mm Carbo Single Swivel Block with Becket

Harken's Single Carbo AirBlock 2601 has a 2-1/4 inch diameter sheave, a becket for line attachment 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.

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Tech Spec Product Info User Generated Content




Sheave diameter  2-1/4 inch 
Length  5-3/16 inch 
Weight w/ shackle  3.4 oz 
Shackle pin diameter  3/16 inch 
Max. line Diameter  7/16 inch 
Safe Working Load  792 lbs 
Breaking Strength  2380 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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