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Harken 2143 57mm Carbo Air Flip-Flop Block with Cam Cleat

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

2143
07/12/2036 10:20 PM
Sale Price

$252.20

In Stock (6)

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Usually delivered within 2 days

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Product Details

The Harken 2143 57mm Carbo Air® Flip-Flop Block with Cam is a high-performance small boat sailing block designed to keep lines running low and clean along the deck. Flip-Flop blocks pivot around the line axis to minimize clutter and maintain efficient line management, while the integrated cam cleat allows for quick, secure line locking and easy release.

Part of Harken's award-winning Carbo Air® block family, the 2143 combines lightweight high-strength resin construction with free-running ball bearings for low-friction performance under load. The 57mm sheave diameter handles lines up to 3/8 in. (10mm), making it well-suited for main and jib sheets, spinnaker halyards, and other control lines on small keelboats and performance dinghies.

Key Features:

  • Flip-Flop design pivots around the line axis to keep lines close to the deck
  • Hinged construction accommodates various lead angles
  • Reversible cam arms adjust and lock in a range of positions for crew accessibility and changing lead angles
  • Carbo Air® construction — lightweight, high-strength resin sideplates reinforced with densely packed glass fibers
  • Free-running ball bearings roll on curved races for low friction and high load efficiency
  • 57mm (2-1/4 in.) sheave diameter with maximum line diameter of 10mm (3/8 in.)
  • Maximum working load: 300 lb (136 kg)
  • Recipient of the Dame Award and Sail Magazine's Freeman-Pittman Award for innovation

The Harken 2143 is an ideal upgrade for small boat sailors seeking a reliable, low-profile deck block solution that combines cam-cleat convenience with the proven performance of the Carbo Air® platform.

Products specifications

Diameter

3/8 Inch or 10 mm

Length

4 5/16 Inches

Mount Type

Mechanical Fasteners

Type

Single Pivoting

Ball Bearings

Plastic

Becket

No Becket

Direction

Any

Integral Cleat

Integral Cam

Ratchet

Ratcheting

Safe Working Load

300

Sheave Diameter

57 mm

Everything went smoothly. Thanks.

Best price, quick shipping, packed well. Exactly what I wanted.

First time customer and very pleased with price and service.

This is car battery thank

Fast delivery. Astonishingly cheaper than other sources. A+++

Good experience

Great price and easy to order. The website says free freight, when checking out it populated $9.99 shipping. I could not get this to go away. Still a great deal

Grate customer service

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