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Harken 57mm Triple Block — Swivel, Becket, Cam Cleat is a complete high-performance solution designed for demanding sailing systems requiring maximum mechanical advantage, precise control and secure line handling. Combining a triple sheave block with an integrated cam cleat and becket, this setup delivers powerful trimming with efficient load management in a compact design.
Part of the trusted Carbo Air range, this block offers low-friction performance and exceptional strength while remaining lightweight and easy to handle. The triple sheave configuration provides maximum purchase for high-load applications, while the swivel head ensures optimal alignment under changing loads, reducing friction and improving efficiency.
The integrated cam cleat allows for quick adjustment and secure line locking, while the becket enables additional purchase configurations for more complex rigging systems. Ideal for mainsheets, vangs and advanced control setups on performance dinghies and small keelboats.
Specifications
Length: 142 mm / 5 5/8 in
Weight: 442 g / 15.6 oz
Sheave Diameter: 57 mm / 2 1/4 in
Maximum Line Diameter: 10 mm / 3/8 in
Maximum Working Load: 816 kg / 1800 lb
Breaking Load: 2040 kg / 4500 lb
Shackle Pin Diameter: 6 mm / 1/4 in
Key Features
- Triple sheave design for maximum mechanical advantage
- Integrated cam cleat for quick, secure line holding
- Becket allows additional purchase and flexible rigging setups
- Low-friction Carbo Air construction for smooth, efficient performance
- Swivel head for optimal alignment under load
- High working load capacity for demanding control systems
- Lightweight yet strong construction for performance sailing
- Compact all-in-one design reduces the need for additional hardware
- Ideal for mainsheets, vangs and high-load control systems
- Suitable for dinghies and small keelboats
- Reliable performance for racing and active sailing use
