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Attwood Marine 66543-3 Thru-Hull Fitting Stainless Steel 1-1/8 Inch Short

Manufacturer

Attwood Marine

<h3>About Attwood Marine</h3><p><strong>Attwood Marine</strong> has been a cornerstone of the boating world for over a century. Founded with a commitment to quality engineering and practical design, Attwood grew from manufacturing underwater hardware and on-deck fittings into one of the most recognized names across every segment of the marine accessories market. Today, the brand operates as part of the Navico Group by Brunswick — a global family of market-leading marine companies — yet it has never lost the focused, boater-first philosophy that built its reputation.</p><p>What sets Attwood apart is their end-to-end approach: they design, manufacture, test, and distribute their own products rather than simply resourcing components from third parties. Every product in their catalog is tested against the highest U.S. Coast Guard (USCG), American Boat and Yacht Council (ABYC), and CE standards, giving boaters and OEM boat builders alike the confidence that Attwood parts will perform when it matters most. Corrosion-resistant materials — including 304 and 316 stainless steel, chrome-plated zinc, and marine-grade synthetics — are used throughout the lineup to ensure durability in both freshwater and saltwater environments.</p><p>Attwood is also a leading OEM supplier, meaning you'll find their components pre-installed on boats straight from the factory. That pedigree speaks volumes: when boat manufacturers trust a brand to equip new vessels, that's a strong vote of confidence for the aftermarket buyer as well.</p><h3>Attwood Marine Product Categories</h3><p>Attwood's catalog spans a remarkably broad range of marine needs. On the docking and mooring side, their <a href="/7239-attwood-marine-fenders-201953">boat fenders</a> provide reliable hull protection against docks, pilings, and other vessels — an essential piece of gear for any boat owner. For on-water comfort and cockpit organization, Attwood's <a href="/7239-attwood-marine-seat-pedestal-packages-202496">seat &amp; pedestal packages</a> deliver complete seating system solutions backed by years of ergonomic engineering, while their <a href="/7239-attwood-marine-seat-clamp-mounts-202497">seat clamp mounts</a> and <a href="/7239-attwood-marine-seat-clamp-mounts-200927">mounting hardware</a> make swapping or positioning seats quick and secure. Rounding out the seating ecosystem, Attwood's broad selection of <a href="/7239-attwood-marine-seating-table-parts-accessories-202501">seating &amp; table parts and accessories</a> keeps every swivel, slide, and fitting performing at its best season after season.</p><p>Beyond seating and docking, Attwood is well known for its bilge and aerator pumps (including the iconic Sahara Mk2 and Tsunami series), navigation lighting, fuel systems, rod holders, and trailering accessories — making it a one-stop resource for outfitting or refreshing virtually any powerboat, fishing boat, or recreational vessel.</p><h3>Why Boaters Trust Attwood</h3><ul><li><strong>100+ years of marine expertise</strong> — a track record that few brands can match</li><li><strong>USCG, ABYC &amp; CE certified</strong> products built to rigorous safety and performance standards</li><li><strong>OEM-preferred supplier</strong> to leading boat manufacturers worldwide</li><li><strong>Corrosion-resistant construction</strong> engineered for saltwater and freshwater environments</li><li><strong>Full design-to-distribution control</strong> ensuring consistent quality across every product</li></ul>

Part Number

66543-3
06/08/2036 1:12 AM
Sale Price

$33.92

4 left at this price

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Usually delivered within 2 days

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Fitment guaranteed

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Product Details

The Attwood Marine 66543-3 is a premium thru-hull fitting designed for above-waterline marine applications requiring a 1-1/8 inch hose connection. This short-length fitting provides a secure, watertight passage through boat hulls for plumbing, livewell systems, and washdown installations.

Key Features:

  • Cast from marine-grade 316 stainless steel for superior corrosion resistance in harsh saltwater environments
  • Integrated channel under the flange designed to hold a bead of marine sealant for enhanced watertight integrity
  • Wrench flats or end notch for easy installation and secure tightening
  • Short body design ideal for installations with limited space behind the hull
  • Accepts 1-1/8 inch ID hose for reliable fluid transfer

Important: This fitting is engineered for above-waterline installations only and should not be used for below-waterline applications. Always use appropriate marine sealant during installation to ensure a proper seal.

Attwood Marine products are trusted by boaters worldwide for their durability and reliability in demanding marine conditions. This thru-hull fitting delivers the quality construction needed for safe, long-lasting performance.

Products specifications

Flange

2-1/4"

Hose

1-1/8"

Hose Size

1-1/8" I.D.

Install Hole Saw Size

1-1/2"

Length

2-1/2"

Very straight forward and easy to navigate website

had a glitch on the site but overall pretty satisfied

Easy to search, good pricing.

fine

Great experience

perfect

fairly easy, shipping was expensive though

This is our second order from Autoplicity. The first one didn't go so well due to a mix up with the Sparco seat pricing. Though I was starting to question our decision to order from them after several emails and phone calls and online chats, they came through in the end. These guys earned our second order by honoring the price they had listed and then calling to follow up when our race seat was shipped. Since this group was able turn our bad experience into a positive one we made our second order and, so far, it looks like they are again getting us what we want at the best price we can find. We are happy to recommend Autoplicty and plan on using them for future orders. There is one specific thing we would recommend, change the quality and volume of the hold music on the 800 #. It sounded like we were calling a 1970's van with a blown Jensen stereo turned all the way up,...

THANKS SO FOR GOOD PRICE

Good price.

Pricing was good and customer service quick to respond.

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