Harken 2645 40mm Carbo Air Single Block with Swivel and Cam Cleat

The Harken 2645 is a 40mm Carbo Air® single block with an integrated swivel and cam cleat, engineered for high-performance sailing applications where low friction, light weight, and reliable line control are essential. Part of Harken's award-winning Carbo Air® block family, the 2645 delivers an exceptional strength-to-weight ratio at an accessible price point.

Key Features:

• Lightweight Construction: Consistently 30% lighter than equivalent Harken Classic blocks
• Superior Strength: 60% stronger than equivalent Classic blocks for confident, high-load use
• High-Strength Resin Sideplates: Nylon-resin sideplates densely packed with long-glass fibers for a compact, durable build
• UV-Stabilized Components: Ball bearings, sheave, and sideplates are UV-stabilized with carbon-black additive for long-term protection in marine environments
• Low-Friction Ball Bearings: Sheave spins on high-load ball bearings with fitted races for smooth, efficient operation
• Three-Way Swivel Head: Swivels and locks in front or side positions to prevent line twisting and allow quick adjustments
• Integrated Cam Cleat: Securely holds lines and releases instantly for precise, easy trimming
• Easy Maintenance: Fully disassembled with a single Allen wrench

Specifications:

• Sheave Diameter: 1‑9/16" (40 mm)
• Maximum Line Diameter: 1/4" (6 mm)
• Maximum Working Load: 150 lb (68 kg)
• Breaking Load: 300 lb (136 kg)
• Weight: 4.2 oz (119 g)

Ideal for jib and mainsheet systems on high-performance dinghies, and for loaded control lines on small keelboats. Common applications include main/jib sheets, mainsheet fine-tune systems, control lines, vangs, cunninghams, and outhauls. A recipient of both the Dame Award and Sail Magazine's Freeman-Pittman Award for innovation, the Carbo Air® line represents a benchmark in composite block technology.