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Harken 40mm Swivel Double Carbo Airblock w/ Becket

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Harken 40mm Swivel Double Carbo Airblock w/ Becket
SKU #: HK_HAR2639

Regular Price: $78.70

Special Price $68.99

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.

Companions to the popular Harken® Black Magic® line, these small, compact blocks have very high working loads for safe, easy trimming. Use for jib and mainsheet systems on high-performance dinghies and for loaded control lines on small keelboats.  Other common uses are mainsheet fine-tune, vangs, cunninghams, and outhauls.

Swivel blocks can lock in two directions or spin freely.




  Imperial Metric
Sheave Diameter 1 9/16 in 40 mm
Max Line Diameter 3/8 in 10 mm
Max Working Load 970 lb 440 kg
Breaking Load 2,380 lb 1,080 kg
Shackle Pin Diameter 3/16 in 5 mm
Weight w/ Shackle 3.4 oz 890 g
Length 4 5/16 in 110 mm
Additional Information

Additional Information

Brand Harken
Gender No
Location No
Activity No
Material Carbo
Max Working Load 970lb / 440kg
Max Line Diam 10 mm (3/8")
Length No