My Account
Shopping Cart

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

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

RF20312
09/11/2036 6:53 PM
Sale Price

$36.30

2 left at this price

delivery box

Usually delivered within 2 days

Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

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

very easy

A few items could have a better description.

very smooth and efficient web site.

I love how you use amazon payments. It makes everything super easy.

Good SO far!

Good Price Nice Radio

They had what I needed, No hassle ordering. and it shipped fast.

Quick Ship. Thanks. Low Prices.

Great price - even with shipping price was still 10% less than the lowest price I found with "free" shipping. Great communication and fast shipping. Glad I found the site!

OK. Hope to receive my order by the specified date.

The company shipped fast and was easy to communicate with. Would recommend this company.

Fantastic ! Ordered a Weather Tech Cargo Liner for my 2012 Ford Explorer. Price was $60 less here than ALL other sites on web. I was skeptical that this was going to be a counterfeit -- as the price was too good to be true. I was extremely happy to receive the genuine product as I expected in less than a week -- and for $60 less than the competitors ! GREAT VALUE and great service ! I will definitely be back !!

great price free shipping thanks

I ordered the Edge Evolution CS for my 2008 F150 and it has brought my truck to life. Setup was simple and I could immediately feel the difference in the acceleration and transmission shifting. I would definitely recommend this product.<br>Autoplicity had the best price on the tuner that I could find for brand new. However, they did charge for shipping and it was slower than other sites I looked at. Overall, I still got the tuner cheaper that any other competitor.

Share icon
Return Policy
Returns are easy at Boatplicity

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy