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Ronstan RF8081BLU Sheaveless Block 3/8" Line 3/8" Webbing Blue

Manufacturer

Ronstan

<h3>Ronstan: Precision Sailing Hardware Built for Every Sailor</h3><p><strong>Ronstan</strong> is one of the most respected names in sailboat hardware — and with good reason. <a href="/11561-ronstan">Ronstan</a> traces its roots back to 1953, when two Australian sailors, Ron Allatt and Stan Lenepveu, founded Ronstan Marine Equipment Pty Ltd in Melbourne, Australia. What started as a passion project supplying handcrafted yacht fittings to their local sailing club gradually grew into a global enterprise recognized for engineering excellence and real-world performance.</p><p>Today, Ronstan is headquartered in Braeside, Victoria, Australia, with international offices in the United States and Denmark, and production facilities across three continents. The brand distributes to more than 40 countries and handles upwards of 4.9 million units out of its Melbourne facility every year. In November 2023, Ronstan joined Groupe Wichard, further cementing its place among the world&apos;s most influential marine hardware groups.</p><h3>Engineering That Performs On the Water</h3><p>What sets Ronstan apart from generic marine suppliers is its deep commitment to innovation and in-house manufacturing capability. Ronstan&apos;s engineering teams — spread across Australia, the United Kingdom, and Denmark — draw on diverse sailing traditions to develop products that meet the demands of wildly different markets: from club dinghy racers to offshore bluewater cruisers. The brand&apos;s catalog spans blocks, winches, travelers, furling systems, batten systems, stainless steel rigging hardware, and a full suite of deck gear. Ronstan is also the official hardware supplier to the Australian Sailing Team.</p><p>The brand&apos;s in-house manufacturing includes precision CNC machining of aluminum, brass, and stainless steel, as well as advanced plastic injection molding using high-performance engineering polymers — including composites reinforced with up to 60% long-strand glass and carbon fiber. This vertical integration means Ronstan controls quality from design to delivery.</p><h3>Core Product Categories</h3><p>Three categories stand out as workhorses of the Ronstan lineup. <a href="/11561-ronstan-fairleads-200387">Ronstan Fairleads</a> are purpose-designed to guide, contain, and correct the lead angle of control lines across a range of deck configurations — a deceptively simple piece of hardware that plays a critical role in clean, friction-free sail handling. For securing lines under load, <a href="/11561-ronstan-cleats-200268">Ronstan Cleats</a> offer a comprehensive range spanning jam cleats, vee cleats, and the brand&apos;s well-known C-Cleat&trade; and T-Cleat&trade; cam cleat families, each engineered for reliable cleating and easy release in all conditions. Completing the rigging equation, <a href="/11561-ronstan-shackles-200937">Ronstan Shackles</a> — including the innovative Triggersnaps&trade; snap shackle range — are individually proof-load tested and designed for intuitive one-handed operation, making them a trusted choice for racers and cruisers alike.</p><h3>From Dinghies to Maxis</h3><p>One of Ronstan&apos;s most distinctive qualities is its breadth. The same brand that equips Olympic-class dinghies also supplies hardware to some of the largest and fastest offshore racing yachts in the world. Whether you&apos;re outfitting a small club boat or a serious offshore campaigner, Ronstan&apos;s catalog has a solution engineered to the right weight, load rating, and finish for the task at hand.</p>

Part Number

RF8081BLU
09/12/2036 10:48 PM
Sale Price

$13.12

In Stock (5)

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Usually delivered within 2 days

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Fitment guaranteed

Fitment guaranteed

Product Details

The Ronstan RF8081BLU is an ultra-lightweight sheaveless block designed for high-performance sailing, kitesurfing, paragliding, and control line applications. With no moving parts, this innovative block provides ultimate durability and maintenance-free operation, making it ideal for environments where sand, grit, and salt water would compromise traditional bearing systems.

Key Features:

  • Sheaveless design eliminates moving parts for maintenance-free durability
  • Ultra-lightweight at only 12g (0.42 oz) with 1,000kg (2,200 lbs) breaking load
  • Accepts lines from 1.4mm (1/16") up to 10mm (3/8") diameter
  • Compatible with hi-tech uncovered braids and traditional double braids
  • Elongated attachment aperture optimized for soft attachment and webbing
  • 3-dimensional geometry is gentle on lines while tolerating poor lead angles
  • Color-coded blue anodized aluminum construction
  • Impact resistant and grit/salt resistant

Applications:

Perfect for high-performance dinghy rigging including tweakers, vangs, trapezes, cunninghams, and barber haulers. Also ideal for kitesurfing control lines, paraglider systems, power kites, lazy jacks, sail covers, tie-downs, and hoists.

Specifications:

  • Line Diameter Range: 1.4mm - 10mm (1/16" - 3/8")
  • Dimensions: 36mm L × 24.8mm W × 14.5mm H (1-7/16" × 1" × 9/16")
  • Breaking Load: 1,000kg (2,200 lbs)
  • Weight: 12g (0.42 oz)
  • Material: Anodized Aluminum
  • Color: Blue

Products specifications

Length

1 7/16 Inches

Weight

0.03

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