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Ronstan RF20312 Series 20 Triple Block with 2-Axis Shackle Head and Becket

Manufacturer

Ronstan

<h3>About Ronstan – A Legacy Built on the Water</h3><p>Few names in the sailing world carry as much weight as Ronstan. <strong>Founded in 1953</strong> by Ron Allat and Stan Lenepveu, the company began as a small boatbuilding operation in Highett, a suburb of Melbourne, Australia. What started as handcrafting custom yacht fittings for fellow sailors at the nearby Black Rock Yacht Club steadily grew into one of the most respected sailboat hardware manufacturers on the planet. The brand name itself is a nod to its founders — Ron and Stan — whose passion for sailing and precision craftsmanship shaped the company's DNA from day one.</p><p>Today, <strong>Ronstan International</strong> is a globally recognised manufacturer and supplier of sailboat hardware, rigging components, winches, sailing gear, and accessories, with its head office remaining in Braeside, Victoria, Australia. The company has established manufacturing facilities in Australia, Denmark, and Indonesia, along with sales offices in the United States, and distributes products to sailors in over 40 countries around the world. In November 2023, Ronstan joined <strong>Groupe Wichard</strong>, aligning with an industry leader whose portfolio spans more than ten world-renowned brands in the sailing and safety markets — a move that further strengthens Ronstan's global reach and product offering.</p><h3>Engineered for Every Sailor, Proven at the Highest Levels</h3><p>Ronstan's reputation spans the full spectrum of sailing — from first-time dinghy sailors to elite competitors at the America's Cup and Olympic Games. The brand serves as the official supplier to the Australian Sailing Team, and Ronstan hardware has appeared aboard medal-winning boats across multiple Olympic campaigns. That pedigree at the pinnacle of racing directly fuels the innovation available to everyday sailors: the demanding performance requirements of top-tier competition have driven many of the technical breakthroughs found throughout Ronstan's broader product range.</p><p>The company's catalog encompasses well over 2,000 products, including pulley blocks, traveller systems, furlers, rope cleats, stainless steel fittings, shackles, snap shackles, and winches. Whether you're outfitting a small racing dinghy, a family cruiser, or an offshore race yacht, Ronstan offers hardware designed and tested to perform in real-world conditions. Their in-house capabilities span design, engineering, precision injection moulding, CNC machining, metal pressing, and assembly — all of which contribute to the consistent quality sailors have come to expect from the brand.</p><h3>Top Ronstan Product Categories</h3><p>Among Ronstan's most popular product lines are their <a href="/11561-ronstan-tiller-extensions-accessories-202641">Tiller Extensions &amp; Accessories</a>, which encompass both their renowned carbon fibre and alloy tiller extension ranges. Whether you need a lightweight, rigid fixed-length stick or a telescopic option for adjustable reach, Ronstan's tiller extensions are engineered for decisive helm response and positive grip in all conditions. Complementing these are Ronstan's <a href="/11561-ronstan-tiller-extensions-accessories-201068">Tiller Extension Accessories</a> — including universal joints, retaining clips, and end knobs — that allow sailors to fine-tune their setup or replace worn components with ease.</p><p>Ronstan also produces a well-regarded line of <a href="/11561-ronstan-fairleads-201944">Fairleads</a>, designed to guide lines smoothly across a boat's deck. Available in UV-stabilised nylon and with optional stainless steel liners for added strength and longevity, these practical fittings are a staple of both dinghy and keelboat rigging setups worldwide.</p><h3>Why Choose Ronstan?</h3><ul><li><strong>70+ years of marine hardware expertise</strong> rooted in Australian sailing culture</li><li>Products trusted by Olympic sailors, offshore racers, and cruising sailors alike</li><li>Over 2,000 products covering everything from small dinghy fittings to superyacht systems</li><li>Advanced manufacturing across three international production facilities</li><li>Part of Groupe Wichard, adding complementary product depth and global support</li></ul>

Part Number

RF20312
06/03/2036 8:25 AM
Sale Price

$36.30

In Stock (5)

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Usually delivered within 2 days

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Product Details

The Ronstan RF20312 Series 20 Triple Block with 2-Axis Shackle Head and Becket delivers high-performance efficiency for dinghy and small keelboat sailors who need precise feedback from their control lines. This 20mm triple block features an innovative two-stage bearing system that maintains smooth operation under both moderate and high loads, making it ideal for hand-held lines where sensitivity to wind changes is critical.

Innovative Two-Stage Bearing System:

At the heart of this block is a unique dual-bearing design. Acetal ball bearings provide exceptional efficiency under moderate loads, ensuring smooth operation during normal sailing conditions. As forces increase, a plain acetal bearing running on a stainless steel race takes over, protecting the ball bearings from distortion while maintaining low friction performance. This intelligent system delivers consistent performance across varying load conditions.

Durable Construction:

  • UV-stable acetal sheave for long-lasting outdoor performance
  • Fiber-reinforced nylon cheeks provide rigidity while minimizing weight
  • 316 stainless steel load straps add structural strength
  • Low-profile shackle pin head prevents snagging on smaller diameter lines
  • 2-axis shackle head allows multi-directional attachment flexibility
  • Integrated becket for easy system rigging

Ideal Applications:

  • 6:1 purchase systems for backstays
  • Boom vang controls
  • Outhaul adjustments
  • Halyard tuning systems
  • Cunningham controls
  • Backstay tensioners on dinghies and smaller keelboats

Specifications:

  • Sheave diameter: 20mm
  • Recommended line size: 1/4" (6mm)
  • Shackle pin diameter: 1/8"
  • Configuration: Triple sheave with becket
  • Attachment: 2-axis shackle head

This lightweight, high-efficiency block is designed to help sailors detect subtle changes in sail trim and wind conditions, providing the tactile feedback needed for optimal boat performance.

Products specifications

Diameter

1/4 Inch or 6 mm

Mount Type

Side Shackle

Type

Triple

Ball Bearings

Stainless Steel

Becket

Becket

Direction

Any

Integral Cleat

No Integral Cleat

Ratchet

Non Ratcheting

Safe Working Load

880 Pounds

Sheave Diameter

20 mm

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