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Harken 340 29mm Carbo Air Single Block with Swivel

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

340
06/02/2036 5:58 PM
Sale Price

$21.82

In Stock (9)

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Usually delivered within 2 days

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Product Details

The Harken 340 is a 29mm Carbo Air® single block with swivel that allows either a 2:1 or 3:1 purchase system. Designed for high-performance sailing applications, this block combines lightweight composite construction with exceptional strength and reliability.

Key Features:

  • 30% lighter and 60% stronger than equivalent Classic blocks
  • UV-stabilized, fiber-reinforced composite sideplates for maximum durability
  • Low-friction sheave optimized for small-diameter control lines
  • Integrated swivel for improved line lead and reduced wear
  • Compact design ideal for space-limited installations
  • High working load capacity for demanding sailing conditions

Applications:

  • Jib and mainsheet systems on high-performance dinghies
  • High-load control lines on small keelboats
  • Racing applications where weight savings are critical
  • Any system requiring reliable small-diameter line handling

Award-winning Carbo AirBlocks® have earned both the Dame Award and Sail Magazine's Freeman-Pittman Award for innovation. These blocks deliver a proven strength-to-weight ratio that racers and performance sailors depend on. The 29mm sheave size works perfectly with modern small-diameter, high-tech lines favored in competitive sailing.

Part of Harken's comprehensive Carbo Air series, the 340 block represents decades of marine hardware engineering expertise combined with advanced composite materials technology.

Products specifications

Type

Single

Diameter

5/16 Inch or 8 mm

Length

2 5/8 Inches

Mount Type

Swivel Shackle

Weight

.9 Ounces

Ball Bearings

Plastic

Becket

No Becket

Direction

Any

Integral Cleat

No Integral Cleat

Ratchet

Non Ratcheting

Safe Working Load

330 Pounds

Sheave Diameter

29 mm

The best&amp; very fast!

Excellent

Good price. Hopefully quick shipping

easy

Very good payment options

The part got here a day after I ordered it. It came in great condition & was pretty easy to install. Would 100% shop from autoplicity again!

good

Great.

Thank you

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