Ronstan Series 40 All Purpose Block, 40mm Sheave, Universal Head

Experience reliable performance and exceptional durability with the Ronstan Series 40 All Purpose Block. Engineered for demanding marine applications, this block expertly handles high working loads, ensuring smooth operation for sheets, halyards, and control lines. Built with premium materials like Grade 316 stainless steel and UV-resistant acetal, it's designed for longevity in harsh marine environments. Upgrade your sailing system today.

Key Benefits:

• 40mm Sheave Diameter: Provides efficient operation with various rope sizes.
• 10mm (3/8") Max Rope Capacity: Accommodates a wide range of control lines.
• 400kg (880lbs) Working Load Limit (MWL): Safely manages demanding dynamic and static loads.
• 1000kg (2200lbs) Breaking Load (BL): Ensures robust safety and reliability.
• Grade 316 Stainless Steel Components: Offers superior strength and excellent corrosion resistance in saltwater environments.
• U.V. Stabilized Acetal Sheave: Delivers low-friction, self-lubricating performance and long-term UV resistance.
• Impact & U.V. Resistant Nylon Cheeks: Provides durability and protection against environmental factors.
• Captive Lock™ Universal Head: Offers versatile mounting options, allowing the head to swivel freely or lock in two planes.

Applications: Ideal for mainsails, halyards, vang systems, and spinnaker control lines on dinghies, one-design classes, and sportsboats up to 8m (26').