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57 mm Aluminum ESP Block — Lockoff 57 mm Aluminum ESP Block — Lockoff 57 mm Aluminum ESP Block — Lockoff 57 mm Aluminum ESP Block — Lockoff
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57 mm Aluminum ESP Block — Lockoff

Part No. 6077
$147.00  In Stock
Sheave Ø (mm)57 mm
Sheave Ø (in)2 1/4 in
Maximum line Ø (mm)16 mm
Maximum line Ø (in) 5/8 in
Maximum working load (kg)1000 kg
Maximum working load (lb)2205 lb

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 Ø (mm)57 mm
Sheave Ø (in)2 1/4 in
Length (mm)99 mm
Length (in)3 7/9 in
Weight (g)226 g
Weight (oz)8 oz
Maximum line Ø (mm)16 mm
Maximum line Ø (in) 5/8 in
Maximum working load (kg)1000 kg
Maximum working load (lb)2205 lb
Breaking load (kg)2000 kg
Breaking load (lb)4409 lb
Maximum lockoff load (kg)550 kg
Maximum lockoff load (lb)1200 lb
Fasteners (mm)8 FH mm
Fasteners (in)5/16 FH in
A (mm)13 mm
A (in)1/2 in
B (mm)55 mm
B (in)2 5/32 in
C (mm)51 mm
C (in)2 in
D (mm)14 mm
D (in) 9/16 in
E (mm)57 mm
E (in)2 1/4 in
F (mm)96 mm
F (in)3 25/32 in
FootnoteIf double stacked, upper block/organizer is two-thirds of listed MWL and breaking load. 
Manual: 4638.pdf (open/save)
DWG: 6077.dwg (open/save)
DXF: 6077.dxf (open/save)
IGS: 6077.igs (open/save)
EPS: 6077.eps (open/save)
High-res JPG: 6077.jpg (open/save)

DO NOT use Harken Equipment for Human suspension.

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