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Ronstan RF1850S Series 30 Orbit Block Wide Dee Shackle with 1/8" Slotted Pin

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

RF1850S
09/12/2036 10:49 PM
Sale Price

$7.62

In Stock (9)

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Usually delivered within 2 days

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Product Details

The Ronstan RF1850S is a Grade 316 stainless steel Wide D shackle featuring a 1/8" slotted pin, purpose-built as a conversion accessory for Ronstan's Series 30 Orbit Block lashing system. This shackle allows sailors to quickly convert a Series 30 lashing head Orbit Block into a conventional loop-top block configuration, offering flexible rigging options without requiring a separate block.

Key Features:

  • Grade 316 stainless steel construction for maximum corrosion resistance in saltwater marine environments
  • Wide D (Dee) profile provides a broad, secure bearing surface for block attachment
  • 1/8" slotted pin (3.2mm diameter) for easy installation and removal
  • Dual orientation — fits the Series 30 lashing head block in both 0° and 90° orientations for versatile rigging configurations
  • High strength-to-weight ratio consistent with Ronstan's Orbit Block system design philosophy
  • Compatible with Ronstan Series 30 Orbit Block models RF35101 and RF35101D, and any S30 lashing head Orbit Block

The RF1850S is the ideal shackle upgrade or replacement for sailors looking to expand the functionality of their existing Series 30 Orbit Block lashing setup. Its durable stainless steel construction and lightweight design make it well suited for halyards, sheets, and general running rigging applications.

Products specifications

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Complementary Hardware

First time buyer. So far so good.

Tires fit well. Very satisfied Thank you Charlie

Not much to say, the price was good and the speed of delivery was excellent.

The shipping down to Albuquerque New Mexico was way faster then expected. The part fit like a glove and looks even better. The right part, at the right price. I WILL USE THESE GUYS IN THE FUTURE.

quick, simple, and cheap, in other words awesome, can't wait for the item.

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