Harken 2640 40mm Carbo Triple Block - Swivel

Harken 40mm Triple Block — Swivel is a compact, high-efficiency solution designed for demanding sailing systems requiring increased mechanical advantage and smooth, reliable performance. Part of the trusted Carbo Air range, this block combines lightweight construction with impressive strength.

The triple sheave configuration provides maximum purchase for high-load applications, making it ideal for control lines, vangs and mainsheet systems. 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 Triple Block offers excellent working loads for its size. Suitable for dinghies, keelboats and small yachts, it delivers dependable performance in both racing and cruising conditions.

Specifications

Length: 94 mm / 3 11/16 in

Weight: 118 g / 4.6 oz

Sheave Diameter: 40 mm / 1 9/16 in

Maximum Line Diameter: 10 mm / 3/8 in

Maximum Working Load: 660 kg / 1455 lb

Breaking Load: 1383 kg / 3050 lb

Shackle Pin Diameter: 5 mm / 3/16 in

Key Features

• Triple 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
• High working load capacity for demanding control systems
• Compact and durable design for marine environments
• Ideal for mainsheets, vangs and control line systems
• Suitable for dinghies, keelboats and small yachts
• Reliable performance for racing and cruising use