Harken 40mm Carbo Double Swivel Block w/Becket (HK2639)

Carbo AirBlocks© are 60% stronger and 30% lighter than our classic blocks. Use the 40 mm Carbo for jib and mainsheet systems on high-performance dinghies and for loaded control lines on small keelboats.

The nylon-resin sideplates are densely packed with long-glass fibers for a compact block with a high strength-to-weight ratio. Sheaves spin on high-load ball bearings with fitted races for low-friction operation. Ball bearings, sheave and sideplates UV stabilized with black additive for maximum protection.

Used for

• Main/jib sheets
• Mainsheet fine-tune
• Control lines
• Vangs
• Cunninghams
• Outhauls

Specifications

• Sheave: 40mm
• Length: 110mm
• Weight with shackle: 90g
• Shackle pin: 5mm
• Max line: 10mm
• Safe working load: 440kg
• Breaking strength: 1080kg