If double stacked, upper block/organizer is two-thirds of listed MWL and breaking load.

Harken 40mm Aluminum ESP Organiser 3 Sheave
Deck organisers lead halyards and control lines aft, allowing crew to sail from the security of the cockpit. They lead a large number of lines through a small space. Match Cruising ESP mastbase blocks with organizers for a complete system.
Specification:
Sheave Ø (mm) | 40 mm |
Sheave Ø (in) | 1 9/16 in |
Length (mm) | 179 mm |
Length (in) | 7 11/16 in |
Height (mm) | 24 mm |
Height (in) | 15/16 in |
Weight (g) | 156 g |
Weight (oz) | 5.5 oz |
Maximum line Ø (mm) | 12 mm |
Maximum line Ø (in) | 1/2 in |
Fasteners (mm) | 8 RH mm |
Fasteners (in) | 5/16 RH in |
Maximum working load (kg) | 1361 kg |
Maximum working load (lb) | 3000 lb |
Breaking load (lb) | 6000 lb |
Breaking load (kg) | 2721 kg |
Footnote | If double stacked, upper block/organizer is two-thirds of listed MWL and breaking load. |
Maximum working load/sheave (kg) | 567 kg |
Maximum working load/sheave (lb) | 1250 lb |
We despatch all orders within 24 hours. Orders placed weekdays before 4pm will be shipped the same day.
Call us and speak to an expert on 0191 4297309 - (Mon - Fri / 9am - 5pm).
Pickup currently unavailable at Marine Chandlery: North Shields

Harken 40mm Aluminum ESP Organiser 3 Sheave
Marine Chandlery: North Shields
Unit G4 Narvik Way
Tyne Tunnel Trading Estate
North Shields NE29 7XJ
United Kingdom

Deck organisers lead halyards and control lines aft, allowing crew to sail from the security of the cockpit. They lead a large number of lines through a small space. Match Cruising ESP mastbase blocks with organizers for a complete system.
Specification:
Sheave Ø (mm) | 40 mm |
Sheave Ø (in) | 1 9/16 in |
Length (mm) | 179 mm |
Length (in) | 7 11/16 in |
Height (mm) | 24 mm |
Height (in) | 15/16 in |
Weight (g) | 156 g |
Weight (oz) | 5.5 oz |
Maximum line Ø (mm) | 12 mm |
Maximum line Ø (in) | 1/2 in |
Fasteners (mm) | 8 RH mm |
Fasteners (in) | 5/16 RH in |
Maximum working load (kg) | 1361 kg |
Maximum working load (lb) | 3000 lb |
Breaking load (lb) | 6000 lb |
Breaking load (kg) | 2721 kg |
Footnote | If double stacked, upper block/organizer is two-thirds of listed MWL and breaking load. |
Maximum working load/sheave (kg) | 567 kg |
Maximum working load/sheave (lb) | 1250 lb |