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Ronstan RF41100 Series 40 All-Purpose Single Block with Shackle Head

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

RF41100
06/03/2036 9:24 AM
Sale Price

$18.63

In Stock (8)

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Usually delivered within 2 days

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No Hassle Returns

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Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Ronstan Series 40 All-Purpose Block delivers smooth, efficient performance for dinghy and small keelboat sailors who need precise feedback from handheld control lines. This 40mm single block with shackle head provides the responsiveness necessary to detect subtle wind changes and sail as efficiently as possible.

Key Features:

  • Self-lubricating, UV-stable acetal sheave runs smoothly on a Grade 316 stainless steel shaft for low friction under high loads
  • Fiber-reinforced nylon cheeks with 316 stainless steel load straps provide rigidity and strength while minimizing weight
  • Captive lock secures swivel at 0° or 90° or allows free rotation for versatile positioning
  • Screw pin shackle with low-profile head prevents snagging on smaller lines
  • Designed for moderate to high static and dynamic loads
  • 40mm sheave diameter provides optimal balance of size and performance

Ideal Applications: Halyard tuners, Cunninghams, dinghy sheets, small keelboat sheets, backstay systems, boom vangs in cascade systems, and other control line applications where feedback and efficiency are critical.

Built for durability and performance, this versatile block delivers the smooth operation and reliability that Ronstan marine hardware is known for in sailing applications worldwide.

Products specifications

Type

Single

Diameter

7/16 Inch or 11 mm

Mount Type

Swivel Shackle

Ball Bearings

Plain Bearings

Becket

No Becket

Direction

Any

Integral Cleat

No Integral Cleat

Ratchet

Non Ratcheting

Safe Working Load

882 Pounds

Sheave Diameter

40 mm

Easy internet access. fast shipping. justlike the advertise.

Great company to do business with. Excellent prices and fair shipping rates. I will certainly buy from them in the future.

fine so far

fast and good price

Great pricing, free shipping, and great product!!! What we got was better than OE for 1/5 the price! Thank you!

emailed you yesterday and received a response shortly afterword.

Good Seller, very quick shipping and excellent transaction.

Easy to find and price was good. The product fit well. Works well so far

quick and easy shopping

kinda delayed on the payment confirmation but overall it was short and to the point. no login information needed or ads.

Easy to deal with about shipping questions, great prices, and friendly customer service. One of the few places who says "I'll return you call" and actually does. Thanks...

thanks

This was my first order from Autoplicity, and I was not sure what to expect. The parts were shipped quickly, and Autoplicity had the best price by far.

This was my second order with Autoplicity. The first order I had to call to get an update, but just happens the part was out for delivery the day I had called. This second order went without a hitch! In both cases, shipping was fast and the products delivered at great prices, not to mention some of the best prices on shipping. I will definitely look here for my future parts needs!!

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