Harken 40 mm Carbo Double Swivel Block 2638 – Barton Marine NZ Harken 40 mm Carbo Double Swivel Block 2638 – Barton Marine NZ
Harken 40 mm Carbo Double Swivel Block 2638 – Barton Marine NZ

Harken

Harken 40 mm Carbo Double Swivel Block 2638

$169.00
Tax included.

Harken 40 mm Carbo Air Double Swivel Block (2638) – High‑Load Twin Sheave with 360° Swivel

Upgrade your sail control setup with the Harken 2638, a premium-grade, lightweight double‑sheave pulley tailored for main/jib sheets, vang fine-tune, outhauls, and high-load control systems on dinghies, skiffs, sportboats, and small keelboats.

Made using Harken’s open Carbo Air design, it combines lightweight Carbon® composite side-cheeks with dual 40 mm Delrin® sheaves on marine-grade ball bearings—all mounted on a 360° stainless steel swivel shackle that maintains perfect line alignment and prevents twisting .

🔧 Specifications at a glance:

  • Sheave diameter: 40 mm (1 9/16″); Length: 94 mm (3 11/16″) 

  • Max line size: 10 mm (3/8″) 

  • Working load: 440 kg (970 lb); Breaking strength: 1,080 kg (2,380 lb) 

  • Weight with shackle: 86 g