Harken 40mm Carbo Single Fixed Block

The Harken 40mm Carbo Single Fixed Block (MPN 2650) is a lightweight, high-performance rigging block engineered for applications requiring low-friction line management and dependable load handling. Compact yet robust, this fixed block pairs low weight with exceptional working loads, making it an ideal choice for marine rigging systems, sailing setups, and any application where reliable mechanical advantage with minimal friction is essential.

Built with Harken's proven Carbo Air technology, this block delivers low-friction performance through advanced sheave design. The 40mm sheave diameter accommodates line up to 3/8 inch (10mm) in diameter, providing versatile compatibility across standard rigging rope sizes. The fixed block configuration—meaning the block attachment point does not move—makes it ideal for static applications where a secure, permanent mounting is required. Its compact 3 x 1 x 6 inch footprint and lightweight 0.1 lb construction allow for space-efficient installation without compromising load capacity or durability. The aluminum-composite construction balances strength with minimal weight, a critical consideration in applications where every ounce impacts overall system performance.

This block is engineered for riggers, marine professionals, and sailing enthusiasts who demand reliable performance in both routine operations and demanding conditions. Whether used for mainsail trim, jib control, spinnaker handling, or general-purpose rigging work, the 40mm Carbo block delivers the low-friction efficiency that translates to easier line handling and consistent performance. The fixed-block design is particularly suited to applications where the block remains stationary while line moves through it—such as traveler systems, control line arrangements, and load-bearing pulley configurations.

Harken's Carbo Air block line represents an affordable alternative to premium block options while maintaining the low-friction characteristics essential to efficient rigging. The 40mm single fixed block integrates seamlessly into existing setups or serves as a foundation for new rigging systems where mechanical advantage, durability, and ease of maintenance are priorities.