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Harken 3405 1 Ton Twing Block with Spring-Loaded Side Opening

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

3405
06/01/2036 4:30 AM
Sale Price

$201.63

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Product Details

The Harken 3405 is a precision-engineered 1-ton twing block designed for easy one-handed rigging, even while wearing sailing gloves. This innovative block features a spring-loaded side opening mechanism that allows quick attachment and removal from sheets without threading. Black anodized aluminum sideplates provide exceptional strength while protective polyurethane bumpers safeguard both the block and your boat's deck and topsides.

Key Features:

  • Spring-loaded button release enables true one-handed operation for quick rigging and removal
  • Side-opening sideplate design eliminates need to thread line through block
  • Anti-capsize bar maintains proper sheave alignment on the sheet
  • ULC main bearing system ensures smooth rotation under extreme loads
  • Sideload balls distribute forces when block operates off-axis in light air conditions
  • Thimble at pivot base allows versatile 1:1 or 2:1 control configurations
  • Machined aluminum inner sideplates deliver high strength-to-weight ratio
  • Soft polyurethane outer bumpers protect block and deck surfaces from damage

Common Applications:

  • Twing and tweaker control for code zero sheets
  • Spinnaker sheet and guy control systems
  • Can function as a snatch block when paired with a soft shackle

Technical Specifications:

  • Sheave diameter: 38.5mm (1-1/2")
  • Maximum line diameter: 11mm (0.43")
  • Maximum working load: 1000kg (2205 lbs)
  • Breaking load: 2000kg (4409 lbs)

The Harken 3405 shares its proven bearing system with Harken's 2.3-ton high-load snatch block, ensuring reliable performance in demanding sailing conditions.

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SO FAR THE CHECKOUT WAS GOOD-WE WILLSEE HOW IT GOES WHEN I RECIEVE THE BUMPER

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I quickly found the part I was looking for and the price was great.

No issues w/the order... shipped quickly and parts arrive in undamaged/perfect condition...

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good prices and free shipping

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