Harken 18 mm T2 Soft-Attach Double Block 2158

Harken 18mm T2™ Soft-Attach Double Block – 2158

The Harken 18mm T2™ Soft-Attach Double Block 2158 is an ultra-lightweight, high-strength double block designed for modern performance sailing systems. Featuring stainless steel ball bearings, integrated composite line guides, and a versatile soft-attach design, it delivers exceptional strength-to-weight performance for traveller controls, mainsheets, vangs, cascades, and lightweight purchase systems.

The Harken 18mm T2™ Soft-Attach Double Block 2158 is engineered for sailors seeking maximum performance with minimal weight. Combining Harken's innovative T2™ architecture with a double-sheave configuration, this compact block provides efficient load distribution and smooth operation in demanding sailing applications.

Designed without traditional metal shackles, the T2™ system allows the block to be tied, spliced, or lashed directly into rigging systems using the supplied Spectra® attachment line. This approach reduces overall weight, eliminates unnecessary hardware, and provides greater flexibility when positioning blocks within complex rigging arrangements.

The 18mm double block incorporates stainless steel ball bearings along with an integrated stainless steel inner race and rivet, delivering smooth, low-friction performance and exceptional durability. The innovative load path routes the attachment line directly through the block head and sheave, reducing loads on the sideplates while creating an additional safety backup within the system.

A key feature of the T2™ double block design is the integrated composite line guides. These guides position the attachment lashing toward the outer edges of the sideplates, helping prevent block capsizing and ensuring smooth operation under varying load angles.

With a maximum working load of 204kg and a breaking load of 680kg, the Harken 2158 provides impressive strength for its compact size and weight of just 17 grams. It is ideal for traveller controls, mainsheet systems, vang purchases, cascades, bridles, and other lightweight control systems found on modern dinghies, skiffs, beach catamarans, sportboats, and racing yachts.

Key Features

• T2™ soft-attach double block design
• Dual sheave configuration for purchase systems
• Ultra-lightweight construction at only 17g
• Stainless steel ball bearings
• Integrated stainless steel inner race and rivet
• Composite fiber-reinforced sideplates
• Integrated composite line guides
• Helps prevent block capsizing
• Soft attachment using supplied Spectra® line
• Load-bearing attachment path through block centre
• Built-in safety backup through lashing system
• Smooth, low-friction operation

Ideal For

• Traveller control systems
• Mainsheet purchases
• Vang systems
• Cascade systems
• Bridle systems
• Dinghy sailing
• Skiff racing
• Beach catamarans
• Sportsboats
• Foiling classes
• Lightweight racing yacht rigging

Technical Specifications

• Model: 2158
• Block Type: T2™ Soft-Attach Double Block
• Sheave Diameter: 18mm
• Length: 28mm
• Weight: 17g
• Maximum Line Diameter: 5mm
• Maximum Working Load: 204kg
• Breaking Load: 680kg
• Bearings: Stainless Steel Ball Bearings
• Sideplates: Composite Fiber-Reinforced
• Attachment: Spectra® Soft-Attach Line Included

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