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Harken 57mm Swivel Triple Carbo Airblock

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Harken 57mm Swivel Triple Carbo Airblock
SKU #: HK_HAR2604

Regular Price: $144.05

Special Price $126.99

Availability: In stock

Harken's Carbo AirBlocks® are 60% stronger and 30% lighter than Classic blocks.  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 are UV-stablized for maximum protection.

The high-load 57mm Carbo has a broad working range. Use for main and jib sheets on centerboard and small keelboats, and for mainsheet systems on catamarans.  Other uses include mainsheet fine-tune, control lines, vangs, cunninghams, and outhauls.

Swivel blocks can lock in two directions or spin freely to avoid lines twisting.




  Imperial Metric
Sheave Diameter 2 1/4 in 57 mm
Max Line Diameter 7/16 in 10 mm
Max Working Load 2,380 lb 1,080 kg
Breaking Load 5,000 lb 2,270 kg
Shackle Pin Diameter N/A 6 mm
Weight w/ Shackle 9 oz 255 g
Length 4 3/4 in 121 mm
Additional Information

Additional Information

Brand Harken
Gender No
Location No
Activity No
Material Carbo
Max Working Load 2,380lb / 1,080kg
Max Line Diam 10 mm (7/16")
Length No