Harken 3251 100mm Single Black Magic High-Load Runner Block
Harken 3251
Runners are used on running backstays of offshore boats to adjust mast bend for different wind conditions.
Integrated sideplate bails and recessed cotter key help produce a smooth design that won’t snag lifelines.
Sideplates and sheaves Hard Lube-anodized for maximum UV protection and a smooth surface. Center cage keeps Torlon® roller bearings separated and parallel to reduce friction.
Torlon is a registered trademark of Solvay Advanced Polymers L.L.C.
Sheave Ø (mm)100 mm
Sheave Ø (in)3 15/16 in
Length (mm)157 mm
Length (in)6 3/16 in
Weight (g)481 g
Weight (oz)17 oz
Clevis pin Ø (mm)15.9 mm
Clevis pin Ø (in)5/8 in
Maximum line Ø (mm)16 mm
Maximum line Ø (in)5/8 in
Maximum working load (kg)3402 kg
Maximum working load (lb)7500 lb
Breaking load (kg)6804 kg
Breaking load (lb)15000 lb
Harken 3251 100mm Single Black Magic High-Load Runner Block
Sale price$883.95
Regular price$1,003.95
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Harken 3251 100mm Single Black Magic High-Load Runner Block
Sale price$883.95
Regular price$1,003.95