Harken Low-profile mastbase halyard lead blocks are lightweight and can be grouped in a small area at the mastbase.

Sheave Ø (mm)
44 mm

Sheave Ø (in)
1 3/4 in

Length (mm)
97 mm

Length (in)
3 13/16 in

Width (mm)
22 mm

Width (in)
7/8 in

Height (mm)
57 mm

Height (in)
2 1/4 in

Weight (g)
95 g

Weight (oz)
3.36 oz

Maximum line Ø (mm)
10 mm

Maximum line Ø (in)
3/8 in

Fasteners (mm)
6 RH mm

Fasteners (in)
1/4 RH in

Maximum working load (kg)
340 kg

Maximum working load (lb)
750 lb

Breaking load (lb)
1500 lb