Harken 2646 40mm Carbo Air Single Block with Becket and Cam Cleat

The Harken 2646 is a 40mm Carbo Air® single block featuring a swivel shackle, becket attachment point, and integrated Carbo-Cam® cleat. Designed for performance sailors who demand lightweight, reliable hardware, this block delivers low-friction line handling in a compact, high-load package ideal for dinghies, small keelboats, and high-performance racing applications.

Key Features:

• Open Air Block design eliminates unnecessary material, reducing overall weight without sacrificing strength
• 30% lighter and 60% higher working load than equivalent Classic-series Harken blocks
• UV-stabilized components — ball bearings, sheave, and side plates are all treated with carbon black for maximum UV and corrosion protection
• Patented swivel shackle locks in front or side positions, or swivels freely to prevent line twist
• Integrated Carbo-Cam® cleat provides secure, easy-release line holding for sheets and control lines
• Becket attachment point allows use as the fixed end of a tackle system for purchase arrangements
• High-strength resin side plates optimized for small-diameter lines favored by performance racers

Specifications:

• Sheave Diameter: 40 mm (1 9/16 in)
• Maximum Line Diameter: 6 mm (1/4 in)
• Maximum Working Load: 136 kg (300 lb)

The Harken 2646 pairs naturally with the Harken 2636 single block for a smooth 2:1 purchase system. Well-suited for jib sheets, mainsheets, vangs, cunninghams, and other high-load control lines where a reliable cam cleat and attachment versatility are required.