HARKEN BLOCK 40MM PIVOT ALLOY CAM

High-strength pivoting lead blocks with cams are used for halyard controls on larger keelboats and as “headknockers” 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 (mm)
40 mm

Sheave Ø (in)
1 9/16 in

Length (mm)
112 mm

Length (in)
4 1/2 in

Weight (g)
186 g

Weight (oz)
6.6 oz

Maximum line Ø (mm)
10 mm

Maximum line Ø (in)
3/8 in

Maximum working load (kg)
136 kg

Maximum working load (lb)
300 lb

Breaking load (kg)
430 kg

Breaking load (lb)
950 lb

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