Harken 2650 40mm Fixed Carbo Block - Removable Strap

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As the Harken 2650 described below but with a removable strap to allow for fitting to mainsheet boom eyes and the like which are riveted  or tied to the boom and can't easily be undone. Simply remove the nyloc nut, then the bolt and the strap will slide off enabling you to fit to a fixed fitting

Low-friction Carbo AirBlocks® are lightweight, strong, reliable—and affordable. Companions to the popular Harken® Black Magic® line, these small, compact blocks have very high working loads for safe, easy trimming.

Carbo AirBlocks® are 60% stronger and 30% lighter than our Classic blocks. Use the 40 mm Carbo for jib and mainsheet systems on high-performance dinghies and for loaded control lines on small keelboats.

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-stabilized with carbon black for maximum protection.

Use for:

  • Main/jib sheets

  • Mainsheet fine-tune

  • Control lines

  • Vangs

  • Cunninghams

  • Outhauls


  • Sheave Ø (mm) - 40 mm

  • Length (mm) - 64 mm

  • Weight (g) - 40 g

  • Maximum line Ø (mm) - 10 mm

  • Maximum working load (kg) - 220 kg

  • Breaking load (kg) - 735 kg