40mm carbo triple block with swivel
Harken Harken
  • 40mm carbo triple block with swivel

Harken 40mm Carbo Triple Swivel Block

Harken triple block 2640 is used for jib and mainsheet systems on high-performance dighies and for loaded control lines on small keelboats.

small 40mm Carbo AirBlocks have 1-9/16 inch diameter sheaves. The shackle swivels to prevent line twist. Carbo AirBlocks are 60 percent stronger and 30 percent lighter than Harken Classic blocks.

Use the 40 mm Carbo blocks for mainsheets, jibsheets, mainsheet fine tune, control lines, vangs, cunninghams and outhauls.

This item is no longer available.
 The item was added to your wishlist.
 The item was added to your shop cart.
Tech Spec Product Info User Generated Content


  • 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.




2640 Block

Sheave diameter  1-9/16 inch 
Length  3-11/16 inch 
Weight w/ shackle  4.6 oz 
Shackle pin diameter  3/16 inch 
Max. line diameter  3/8 inch 
Safe Working Load  1455 lbs 
Breaking Strength  3050 lbs 
BRAND: Harken
Type: Blocks and Sheaves
TotalBoat Blogs Live Tech Support