Harken 2638 40mm Carbo Double Block - Swivel

Harken 40mm Double Block — Swivel is a compact, high-performance solution designed for efficient load handling in a wide range of sailing applications. Part of the trusted Carbo Air range, this block delivers smooth, low-friction performance with excellent strength in a lightweight design.

The double sheave configuration provides increased mechanical advantage, making it ideal for control lines and purchase systems where extra power is required. The swivel head allows the block to align naturally under changing loads, reducing friction and improving trimming efficiency.

Built as a companion to Harken Big Boat blocks, the 40mm Carbo Air Double Block offers impressive working loads for its size. Suitable for dinghies, keelboats and small yachts, it provides reliable performance for both racing and cruising.

Specifications

Length: 94 mm / 3 11/16 in

Weight: 86 g / 3.2 oz

Sheave Diameter: 40 mm / 1 9/16 in

Maximum Line Diameter: 10 mm / 3/8 in

Maximum Working Load: 440 kg / 970 lb

Breaking Load: 1080 kg / 2380 lb

Shackle Pin Diameter: 5 mm / 3/16 in

Key Features

• Double sheave design for increased mechanical advantage
• Low-friction Carbo Air construction for smooth, efficient performance
• Lightweight yet strong for high-load applications
• Swivel head for optimal alignment under load
• Compact, durable design for demanding marine environments
• High working load capacity for safe trimming
• Ideal for control lines and purchase systems
• Suitable for dinghies, keelboats and small yachts
• Reliable performance for racing and cruising use