Harken 2157 40mm Pivoting Block & Carbo Cam Cleat

Harken 40mm Pivoting Lead Block — Carbo-Cam® Cleat is a compact, high-performance solution designed for smooth line control and efficient trimming in dynamic sailing systems. Featuring a pivoting lead block with an integrated Carbo-Cam® cleat, this setup delivers reliable, easy line handling with quick locking under load.

Ideal for halyard controls on larger keelboats and as a “head knocker” system on dinghies and beachcats, this block allows direct sheeting from the boom with optimal lead alignment. The pivoting base follows line movement, reducing friction and improving trimming efficiency in constantly changing conditions.

The Carbo-Cam® cleat can be reversed for either up or down cleating, offering flexibility for different rigging setups. Designed with the same hole spacing and rivet size as Classic models, this block is an easy upgrade for existing systems and can also be used as a becket block for added versatility.

Specifications

Length: 112 mm / 4 1/2 in

Weight: 157 g / 5.5 oz

Sheave Diameter: 40 mm / 1 9/16 in

Maximum Line Diameter: 10 mm / 3/8 in

Maximum Working Load: 91 kg / 200 lb

Breaking Load: 430 kg / 950 lb

Key Features

• Pivoting lead block for smooth, efficient line alignment
• Integrated Carbo-Cam® cleat for quick, reliable line holding
• Cleat can be reversed for up or down cleating
• Ideal for halyard controls on keelboats
• Perfect as a “head knocker” for boom sheeting on dinghies and beachcats
• Compatible with Classic model mounting hole spacing for easy upgrades
• Can be used as a becket block for added versatility
• Low-friction performance for efficient trimming
• Lightweight yet durable construction
• Suitable for performance sailing and active use