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Harken 57mm Triple Swivel Carbo Airblock w/ Cam-Matic® Cleat

$216.30 $190.99
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Harken 57mm Triple Swivel Carbo Airblock w/ Cam-Matic® Cleat

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. Reversible cam arms.



  Imperial Metric
Sheave Diameter 2 1/4 in 57 mm
Max Line Diameter 7/16 in 10 mm
Max Working Load 1,500 lb 680 kg
Breaking Load 3,750 lb 1,700 kg
Shackle Pin Diameter -- 6 mm
Weight w/ Shackle 15.2 oz 431 g
Length 4 3/4 in 121 mm

**Maximum working loads and breaking loads for blocks based on cam strengths