mouseover to enlarge


57 mm Double Over-The-Top Block

Part No. 3003
$433.30  In Stock
Sheave Ø (mm)57 mm
Sheave Ø (in)2 1/4 in
Maximum line Ø (mm)10 mm
Maximum line Ø (in) 3/8 in
Maximum working load (kg)1136 kg
Maximum working load (lb)2500 lb

Over-the-top blocks lead lines aft over cabin houses, coamings, and splashguards.

Sheave Ø (mm)57 mm
Sheave Ø (in)2 1/4 in
Length (mm)83 mm
Length (in)3 1/4 in
Width (mm)62 mm
Width (in)2 7/16 in
Height (mm)83 mm
Height (in)3 1/4 in
Weight (g)346 g
Weight (oz)12.2 oz
Maximum line Ø (mm)10 mm
Maximum line Ø (in) 3/8 in
Number of fasteners
Fasteners (mm)6 FH mm
Fasteners (in)1/4 FH in
Maximum working load (kg)1136 kg
Maximum working load (lb)2500 lb
Breaking load (lb)5000 lb
Breaking load (kg)2272 kg
Drawing - DWG:  3003.dwg (open/save)
Drawing - DXF:  3003.dxf (open/save)
3D drawing - IGS:  3003.igs (open/save)
Photo - EPS:  3003.eps (open/save)
Photo - JPG:  3003.jpg (open/save)

DO NOT use Harken equipment for human suspension unless product is specifically certified and labeled for such use.

  • United States
  • Australia
  • France
  • Italia
  • New Zealand
  • Polska
  • Sverige
  • UK