Harken 40mm Pivoting Lead Block - Cam-Matic Cleat

Item #


Product Description

Harken 40mm Pivoting Lead Bloc - Cam-Matic Cleat

High-strength pivoting lead blocks with cams are used for halyard controls on larger keelboats and as “head knockers” on dinghies and beachcats for sheeting directly from the boom. Hole spacing and rivet size are the same as Classic models, making upgrades easy. Cam reverses for either up or down cleating.

Can be used as becket block.


  • Sheave Ø: 1 9/16 in. (40 mm)

  • Length: 4 1/2 in. (112 mm)

  • Weight: 6.6 oz. (186 g)

  • Maximum line Ø: 3/8 in. (10 mm)

  • Maximum working load: 300 lbs. (136 kg)

  • Breaking load: 950 lbs. (430 kg)

    Footnote: Maximum working loads and breaking loads for blocks based on cam strengths.