Harken 60 mm Single Aluminum Element Block with Swivel & Becket – 6261

Optimize your boat’s line management with the Harken 60 mm Single Aluminum Element Block with Swivel and Becket (6261) — a rugged, versatile block designed for smooth, efficient handling of sheets, halyards, and control lines on cruising and performance sailboats. Built with lightweight yet durable anodized aluminum, this block features a single 60 mm sheave, a swivel head for dynamic alignment under load, and a becket for securing tails or creating simple purchase systems.

The swivel mechanism allows the block to rotate freely to align with changing rope angles, reducing friction and line wear while improving trim precision. The becket — a fixed attachment point opposite the sheave — expands rigging options by letting you create multi-part tackles without extra hardware. Combined with sealed low-friction bearings and Harken’s precision construction, the 6261 block delivers reliable, smooth performance even when handling high loads or frequent adjustments.

Whether you’re setting up control line leads, traveler systems, or halyard redirects, this single block with swivel and becket offers flexibility, strength, and marine-grade durability you can trust.

Technical Specifications

• Brand: Harken

• Model: Single Aluminum Element Block

• Part Number: 6261

• Sheave Diameter: 60 mm (approx. 2.36 in)

• Number of Sheaves: 1

• Swivel: Yes — free rotation

• Becket: Yes — fixed attachment point

• Material: Anodized aluminum sheave and body

• Bearings: Sealed low-friction bearings

• Application: Line control, simple tackles, traveler systems

Benefits

• Swivel alignment improves efficiency as load angles change

• Becket design adds versatility for simple purchase setups

• Smooth, low-friction movement increases responsiveness

• Lightweight and strong, ideal for competitive sailing

• Corrosion-resistant finish stands up to marine environments

Applications

• Main and headsail sheet leads

• Halyard redirects and control line systems

• Traveler and vang setups

• Simple 2:1 purchase tackles with becket

• Cruising and racing sailboat rigging upgrades

Summary for the User

The Harken 6261 is the ideal "workhorse" block for mid-sized keelboats. It is specifically built for applications where the block will be under high tension for long periods, such as a permanent boom vang or a fixed mainsheet system. It provides a professional-grade strength-to-weight ratio without the maintenance requirements of high-end racing blocks.

Maintenance Tip: Occasionally rinse with fresh water to remove salt and grit. Since it uses composite bearings, you should avoid using oils or greases, as they can trap contaminants and actually speed up wear.

Manufacturer : Harken
Manufacturer Part No : 6261