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Harken 57mm Low Load Double Block

HAR3228
$281.95
Harken 57mm Low Load Double Block
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Product Details


    Technical Description


    Black Magic Air blocks are a top favorite of Big Boat performance racers and cruisers. These lightweight, free-running, powerful performers are used for sail controls that see lots of action: mainsheet, runner, halyard, and spinnaker systems. A center cage keeps Torlon® roller bearings separated and parallel to reduce friction. Shackle blocks lock in two directions or swivel to keep line from twisting.
    Low-load blocks have red isolators. They use Torlon® rollers and 316 stainless steel shackles. Standard blocks have 17-4 PH stainless headposts.
    Torlon is a registered trademark of Solvay Advanced Polymers L.L.C.

    Tech Specs

    Imperial Metric
    Sheave Ø 57 mm 2 1/4 in
    Length 132 mm 5 3/16 in
    Weight 342 g 12.05 oz
    Shackle pin Ø 8 mm 5/16 in
    Maximum line Ø 12 mm 7/16 in
    Maximum working load 1250 kg 2755 lb
    Breaking load 2500 kg 5510 lb

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