Harken Carbo Airblock blocks
Harken Harken sailboat hardware
  • Harken Carbo Airblock blocks

Harken 57mm Carbo Fiddle Block

Harken Carbo Fiddle Block 2621 has a 2-1/4 inch diameter sheave coupled with a smaller sheave to prevent line chafe. Carbo AirBlocks are 60 percent stronger and 30 percent lighter than Harken Classic blocks.

High-load with 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.

$48.84 / ea
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Tech Spec Product Info User Generated Content


  • 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




2621 Block

Sheave diameter  2-1/4 inch 
Length  6 inch 
Weight w/ shackle  3.7 oz 
Shackle pin diameter  3/16 inch 
Max. line diameter  7/16 inch 
Safe Working Load  792 lbs 
Breaking Strength  2380 lbs 
BRAND: Harken
Type: Blocks and Sheaves
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