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Harken 57mm Carbo Block with Swivel


Product Description

Harken 57mm Carbo Block with Swivel

The Harken 57mm Carbo Block with Swivel is a low-friction Carbo Air block that is lightweight, strong, reliable—and affordable. Companions to the popular Harken Black Magic block line, these small, compact blocks have very high working loads for safe, easy trimming.  They can be used to replace the single Seaway blocks on a Hobie mainsheet system.  Ideal for 8-10m lines, common on many classes of dingy and small catamarans.

Can be used as replacement for one of the top blocks on an old H16 5:1 Mainsheet system.


Sheave diameter 57 mm
Sheave diameter 2 1/4 in
Length diameter 110 mm
Length diameter 4 5/16 in
Weight 87 g
Weight 3.1 oz
Shackle pin diameter 5 mm
Shackle pin diameter 3/16 in
Maximum line diameter 10 mm
Maximum line diameter 3/8 in
Maximum working load 359 kg
Maximum working load 792 lb
Breaking load 1079 kg
Breaking load 2380 lb

Additional information

Weight 0.22 lbs
Dimensions 6 × 3 × 2 in


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