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Harken, Inc.

Harken 57mm Aluminum Low-Load Double Block — Swivel - #3228

Harken 57mm Aluminum Low-Load Double Block — Swivel - #3228

SKU:H3228

Regular price $427.95 USD
Regular price MSRP:$486.20 USD Sale price $427.95 USD
Sale Available to Order - Contact for Lead Time
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  • Quantities are subject to availability. We will confirm stock before processing your order. If an item is unavailable, we may suggest a substitute or drop ship the product to you. You are welcome to cancel at no charge if substitution/drop shipping does not suit your needs. Please note cut-to-length rope orders are non-returnable once cut.

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.

Sheave ⌀ : 2 1/4"   (57 mm)
Length: 5 3/16"   (132 mm)
Weight: 12.05 oz   (342 g)
Max Line ⌀ : 7/16"   (12 mm)
Max Working Load: 2755 lbs   (1250 kgs)
Breaking Load: 5510 lbs   (2500 kgs)
Shackle Pin ⌀ : 5/16"   (8 mm)
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