Harken 57mm ESP Forkhead Block

Cruising ESP blocks complement our existing blocks in looks and function, but are simpler in design and construction. Sheaves feature sleeve bearings to handle high static loads and are ideal for halyards or limited purchase systems on cruising boats.

Sheave dia. (in) = 2.25
Sheave dia. (mm) = 57 
Length (in) = 4.5
Length (mm) = 114
Weight (oz) = 4.5
Weight (g) = 129
Shackle pin dia. (in) = 1/4
Shackle pin dia. (mm) = 6  
Max. line dia. (in) = 3/8
Max. line dia. (mm) = 10 
Max. working load (lb) = 1650 
Max. working load (kg) = 748
Breaking load (lb) = 3300 
Breaking load (kg) = 1496 

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