Harken 57mm Low Load Double Block

Harken 57mm Low Load Double Block

Product Details

    Tech Info

    Product Description

    Use 57 mm Black Magic® AirBlocks® on offshore boats. These strong, lightweight blocks are sculpted aluminum, with Torlon® rollers and carbon-black balls for strength and UV protection. Rollers are housed in a unique center cage and are isolated for less friction. Blocks feature a three-way head system and come in high- and low-load configurations.

    Use for:
    Sheets, Halyards, Running backstays and Control lines.

    Part Number: 3228
    **Repalces 1952

    Imperial Metric
    Sheave Dia. - 57 mm
    Length 5 3/16" 132 mm
    Weight w/Shackle 12.05 oz 342 gr
    Shackle Pin Dia. 5/16" 8 mm
    Max Line Dia. 7/16" 12 mm
    Maximum Working Load 2755 lbs 1250 kg
    Breaking Load 5510 lbs 2500 kg