My Account
Reward Points
Fast Shipping
Shipping Available
Harken 57mm Triple Block — Swivel, Becket is a powerful, high-efficiency solution designed for demanding control systems where maximum mechanical advantage and smooth performance are essential. Part of the trusted Carbo Air range, this block combines strength, reliability and low-friction operation in a compact, lightweight design.
The triple sheave configuration delivers maximum purchase for high-load applications, making it ideal for mainsheet systems, vangs and complex control setups. The swivel head ensures optimal alignment under load, reducing friction and improving trimming efficiency, while the integrated becket allows for additional purchase configurations and flexible rigging options.
Built as a companion to Harken Big Boat blocks, the 57mm Carbo Air Triple Block provides outstanding working loads while remaining easy to handle. Suitable for dinghies, keelboats and small yachts, it delivers dependable performance in both racing and cruising conditions.
Specifications
Length: 142 mm / 5 5/8 in
Weight: 264 g / 9.3 oz
Sheave Diameter: 57 mm / 2 1/4 in
Maximum Line Diameter: 10 mm / 3/8 in
Maximum Working Load: 1080 kg / 2380 lb
Breaking Load: 2270 kg / 5000 lb
Shackle Pin Diameter: 6 mm / 1/4 in
Key Features
- Triple sheave design for maximum mechanical advantage
- Low-friction Carbo Air construction for smooth, efficient performance
- High working load capacity for demanding sailing systems
- Swivel head for optimal alignment under load
- Integrated becket for flexible rigging and additional purchase setups
- Lightweight yet strong for performance sailing applications
- Compact and durable design for harsh marine environments
- Ideal for mainsheet systems, vangs and high-load control lines
- Suitable for dinghies, keelboats and small yachts
- Reliable performance for both racing and cruising
