Harken 57mm Carbo Blocks

The high-load 57 mm Carbo has a broad working range. Use for main and jib sheets on centerboard and keelboats like Lightnings, Dragons, Solings, and J/24s, and for mainsheet systems on catamarans.

The nylon resin sideplates are densely packed with long-glass fibers for a compact block with a high strength-to-weight ratio.  Ball bearings, sheave, and sideplates are UV-stabilized with carbon black for maximum protection.  Blocks feature Cam-Lock or U-Lock locking systems to lock the shackle in front or side positions, or swivel to keep line from twisting.

Use for:

  • Main/jib sheets

  • Mainsheet fine-tune

  • Control lines

  • Vangs

  • Cunninghams

  • Outhauls

Harken 57mm Carbo Block
Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the ..
Harken 57mm Carbo Block w/Becket
Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the ..
Harken 57mm Double Carbo Block
Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the ..
Harken 57mm Double Carbo Block w/Becket
Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the ..
Harken 57mm Triple Carbo Block
Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the ..
Harken 57mm Triple Carbo Block w/Becket
Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the ..
Harken 57mm Carbo Quad Block
Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the ..
Harken 57mm Carbo Block w/Cam Cleat
Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the ..
Harken 57mm Carbo Block w/Cam Cleat and Becket
Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the ..
Harken 57mm Carbo Cheek Block
Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the ..
Harken 57mm Triple Carbo Block w/Cam Cleat
Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the ..
Harken 57mm Triple Carbo Block w/Cam Cleat & Becket
Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the ..
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