Harken 40 mm Carbo Air Swivel Block 2636

Harken 40 mm Carbo Air Single Swivel Block (2636) – Ultra‑Lightweight & High‑Load

Upgrade your rigging with the Harken 40 mm Carbo Air Swivel Block (model 2636) — a compact powerhouse engineered for maximum strength with minimal weight. This block is perfect for main/jib sheets, vang systems, outhauls, cunninghams, and other control lines on dinghies, skiffs, sportboats, and small yachts.

Constructed with open Carbo Air design, it features lightweight Carbon® side cheeks, a 40 mm Delrin® sheave on stainless steel ball bearings, and a 360° stainless swivel head for superior line alignment and twist prevention. Despite its size, the 2636 delivers outstanding performance:

• Sheave diameter: 40 mm (1 9/16″) 

• Max line capacity: 10 mm (3/8″) 

• Working load: 220 kg (485 lb) — 60 % higher than classic blocks 

• Breaking load: 735 kg (1 620 lb) 

• Weight: 44 g (1.6 oz) — approximately 30 % lighter than comparable classic 

• Length: 86 mm (3 ⅜″) 

✔ Applications: main/jib sheets, traveler fine‑tune, control lines, vang and outhaul systems

Thanks to its smart open-air design, high-performance materials, and premium swivel, the 2636 ensures smooth trimming, reduced friction, and longer life even in harsh marine conditions.