Harken 16mm Block

The Harken 16mm Block (model 404) is the smallest pulley in Harken's block lineup, engineered for precise control of synthetic lines on high-performance sailing dinghies and rigging systems. With a maximum working load of 250 lbs (113 kg), this compact block delivers the precision and durability required in demanding marine and specialized tactical rigging applications where weight savings and reliability are non-negotiable.

The 16mm sheave features Harken's patented bearing system, which uses stainless steel balls captured in a grooved race to ensure smooth, consistent performance under intermittent loading. The O-ring design maintains line control during variable tension cycles, preventing slippage that could compromise system integrity. At just 0.05 lbs, the block's minimal weight is critical for applications where cumulative mass reduction directly impacts handling and responsiveness. The compact 29mm length allows integration into tight rigging spaces without sacrificing mechanical advantage or control precision.

Operators and riggers working with small-diameter synthetic control lines—particularly on ultralight watercraft, specialized recovery systems, or precision load management setups—depend on the 16mm block's predictable load distribution and stainless steel construction. The bearing-race design minimizes friction and wear, extending service life in salt-air and high-use environments where corrosion and mechanical fatigue are constant concerns. This block is the choice for applications demanding proof of load rating and documented reliability over extended operational cycles.