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Harken 2639 40mm Carbo Air Double Block with Becket

Manufacturer

Harken

<h3>About Harken: Performance Marine Hardware Since 1967</h3><p><strong>Harken</strong> is one of the most recognized names in performance marine hardware, with a legacy stretching back to 1967. <a href="/14853-harken">Harken</a> was founded in a 60-foot trailer by brothers Peter Harken and Olaf Harken, who set out to engineer better sailboat hardware than anything the market had to offer. Their early breakthrough — the plastic recirculating ball bearing block — redefined how sailors managed lines under load and launched a brand that would go on to dominate competitive sailing at the highest levels.</p><p>Headquartered in Pewaukee, Wisconsin, and with a major manufacturing facility in Limido Comasco, Italy, Harken operates as an employee-owned company with distribution spanning 48 countries. From club racing dinghies to grand prix offshore programs, Harken hardware has been aboard winning boats for decades — making its Olympic and America's Cup debuts in 1976 and 1977, respectively.</p><h3>A Full Range of Marine Hardware</h3><p>Harken's product lineup is broad by design. The company works hard to be the technological leader in sailboat blocks, deck hardware, winches, and hydraulics, as well as safety and rescue equipment and services. Their marine catalog includes small boat and big boat blocks, travelers and genoa leads, mainsail and headsail handling systems, winches, hydraulics, mooring solutions, and a robust line of spare parts and accessories.</p><p>At the core of it all are Harken's renowned <a href="/14853-harken-pulleys-blocks-200822">Pulleys &amp; Blocks</a> — the product category that started it all. Whether you're outfitting a high-tech racing dinghy or a bluewater cruising yacht, Harken blocks are engineered for high-load capacity, corrosion resistance, and the smoothest possible operation. The lineup spans sheave sizes from 16 mm all the way to 75 mm, with single, double, triple, fiddle, and soft-attach configurations to cover virtually every application on deck.</p><p>Beyond sailing, Harken also produces a dedicated line of sportfishing <a href="/14853-harken-pulleys-blocks-202394">Pulleys &amp; Blocks</a> engineered for the unique demands of offshore fishing. These compact, high-load pulleys are built for outrigger systems, dredge rigging, and heavy-duty line management — bringing the same patented bearing technology that excels on race courses to the rigors of the fishing cockpit.</p><h3>Why Sailors Trust Harken</h3><p>What sets Harken apart is a relentless commitment to engineering. Each product category is developed with input from top sailors, sailmakers, and boat designers — and the results speak for themselves on race courses worldwide. Harken hardware is a consistent fixture on America's Cup campaigns, Volvo Ocean Race fleets, Olympic classes, and everything in between. For cruisers, that race-proven performance translates into gear that is more reliable, longer-lasting, and more responsive than the alternatives.</p><ul><li>Employee-owned company with decades of marine engineering expertise</li><li>Manufacturing in the USA and Italy, with global distribution in 48 countries</li><li>Patented bearing systems engineered for high loads and minimal friction</li><li>Product lines covering everything from small dinghies to superyachts</li><li>Trusted at the Olympic Games and America's Cup since the 1970s</li></ul>

Part Number

2639
07/12/2036 11:15 PM
Sale Price

$84.36

In Stock (7)

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Usually delivered within 2 days

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Product Details

The Harken 2639 40mm Carbo Air® Double Block with Becket is a high-performance sailing block engineered for lightweight strength and smooth, efficient line handling. Built around Harken's legendary Carbo Air® construction, this double block features a carbon fiber-reinforced body that dramatically reduces weight without sacrificing load capacity or durability — a critical advantage in performance racing and cruising applications.

The integrated becket provides an additional attachment point, making this block ideal for multi-purchase tackle systems such as vangs, cunninghams, and mainsheet systems where mechanical advantage and low friction are essential.

Key Features:

  • Carbo Air® construction — carbon-reinforced sideplates deliver maximum strength-to-weight ratio
  • 40mm sheave diameter — optimized for smooth lead and minimal friction on loaded lines
  • Double sheave configuration — supports 2:1 or multi-purchase tackle arrangements
  • Integrated becket — provides additional attachment point for complex rigging systems
  • Stainless steel pin and axle — corrosion-resistant hardware for long-term marine performance
  • Accepts rope and low-stretch line — compatible with Dyneema, Spectra, and conventional rope

Designed for racing sailors and performance cruisers who demand reliable, low-friction rigging hardware, the Harken 2639 integrates seamlessly into existing Harken 40mm Carbo Air® system components for a fully matched, optimized running rigging setup.

Products specifications

Type

Double

Diameter

3/8 Inch or 10 mm

Length

4 5/16 Inches

Mount Type

Swivel Shackle

Weight

0.21

Ball Bearings

Plastic

Becket

Becket

Direction

Any

Integral Cleat

No Integral Cleat

Ratchet

Non Ratcheting

Safe Working Load

970 Pounds

Sheave Diameter

40 mm

all has gone good

Tires were as advertised, quick delivery overall great experience

Great pricing and super fast service!! Thank you!

Quick and easy. I can&amp;#039;t tell if the tire is New or how much gas life is on it of the tire is used. Pictures make it look like the tire does not have much, if any, wear.

Fast

Great prices, speciality items in stock, and fast delivery!

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