Harken 57mm ESP Swivel 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.

Description = Mastbase/swivel  
Sheave dia. (in) = 2.25
Sheave dia. (mm) = 57 
Length (in) = 5.5
Length (mm) = 140
Weight (oz) = 7.7
Weight (g) = 218
Clevis pin dia. (in) = 5/16 
Clevis pin dia. (mm) = 8  
Max. line dia. (in) = 5/8
Max. line dia. (mm) = 16 
Max. working load (lb) = 2205 
Max. working load (kg) = 1000 
Breaking load (lb) = 4409 
Breaking load (kg) = 2000 
Max. lockoff load (lb) = 3/8
Max. lockoff load (kg) = 10 

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