Harken 25mm Fly Block, 1250.ILCA

Harken 25mm Fly Block ILCA – 1250

The Harken 25mm Fly Block 1250 is a lightweight, high-strength performance block designed specifically for ILCA high-performance dinghies. Featuring a stainless steel boom key attachment and exceptional strength-to-weight ratio, it delivers smooth, efficient line handling with minimal aerodynamic drag.

The Harken 25mm Fly Block 1250 is engineered for sailors seeking maximum performance with the least possible weight. Designed specifically for ILCA dinghies, this compact Fly Block delivers outstanding strength, smooth operation, and an aerodynamic profile ideal for modern racing rigs.

Built around Harken's Fly Block concept, the 1250 provides exceptional working loads despite its compact size. Designed for use with modern high-tech control lines, it offers efficient, low-friction performance for systems where weight savings and fast, responsive trimming are essential.

A key feature is the high-strength cast stainless steel boom key, engineered specifically for ILCA applications. Its unique shape and angled design securely retains the block in position, even when there is no line tension, while minimising overall weight and maintaining a low-profile installation.

The lightweight construction helps reduce weight aloft while delivering the durability required for demanding racing conditions. The compact 25mm sheave provides smooth line movement and efficient load handling, making it ideal for boom-mounted control systems and other precision trimming applications.

Whether racing at club level or international competition, the Harken 25mm Fly Block offers the reliability, efficiency, and performance expected from premium Harken hardware.

Key Features

• Designed specifically for ILCA dinghies
• Lightweight Fly Block construction
• Exceptional strength-to-weight ratio
• High-strength cast stainless steel boom key
• Boom key remains secure under zero line tension
• Low aerodynamic profile
• Smooth low-friction operation
• Optimised for modern high-tech control lines
• Compact and durable design
• Ideal for high-performance racing

Ideal For

• ILCA sailing
• Laser sailing
• Dinghy racing
• Boom-mounted control systems
• Outhaul systems
• Cunningham systems
• Vang systems
• Performance racing

Technical Specifications

• Model: 1250
• Product Type: Fly Block with ILCA Boom Key
• Sheave Diameter: 25mm
• Length: 44mm
• Weight: 34g
• Maximum Rope Diameter: 5mm
• Maximum Working Load (MWL): 275kg
• Breaking Load (BL): 550kg
• Attachment: Cast Stainless Steel Boom Key

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