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Sea-Dog Line 520830 90° Thru-Hull Fitting with Stainless Steel Cap

Manufacturer

Sea-Dog Line

<h3>About Sea-Dog Line</h3><p>Few names in the marine industry carry as much history as <strong>Sea-Dog Line</strong>. Founded in 1923 and headquartered in Everett, Washington, Sea-Dog has spent over a century engineering and supplying dependable hardware for boaters, riggers, and marine professionals. Whether you are outfitting a small fishing boat or a serious offshore vessel, Sea-Dog's expansive catalog — spanning more than 2,400 products — is built around one principle: hardware that holds up when it matters most.</p><h3>A Century of Marine Innovation</h3><p>Sea-Dog Line began as a focused marine rigging and hardware supplier, and over the decades grew into one of the most comprehensive sources for anchoring, docking, boarding, and boat-management equipment in the industry. Their product line has expanded to include antenna accessories, trailer hardware, boat hooks, cabinet and hatch fittings, chain and rigging components, and a wide range of electrical accessories — all engineered to withstand the corrosive, high-stress environment of the marine world.</p><p>What sets Sea-Dog apart is a commitment to manufacturing quality that boat owners can rely on season after season. Their hardware is designed for real-world marine use, meaning saltwater resistance, UV stability, and structural durability are never afterthoughts.</p><h3>Marine Visibility & Windshield Systems</h3><p>One of Sea-Dog's highest-demand product areas is their line of <a href="/7549-sea-dog-line-windshield-washers-wipers-replacement-motors-201195">Windshield Washers, Wipers &amp; Replacement Motors</a>. Maintaining clear visibility on the water is a safety-critical function, and Sea-Dog supplies a broad assortment of wiper blades, washer systems, and complete replacement assemblies designed to fit a wide variety of marine windshield configurations. For boaters who need a direct drive solution, Sea-Dog's dedicated <a href="/7549-sea-dog-line-windshield-wiper-motor-8824">Windshield Wiper Motors</a> offer reliable performance in wet, high-vibration marine environments — a category where component quality directly affects on-water safety.</p><h3>Cockpit Comfort & Functionality</h3><p>Beyond hardware and visibility systems, Sea-Dog also brings practical innovation to the helm and cockpit with their <a href="/7549-sea-dog-line-cockpit-fillet-tables-200274">Cockpit &amp; Fillet Tables</a>. These tables are designed to maximize usable space aboard, whether you are prepping a catch, serving guests, or simply organizing gear. Sea-Dog's tables reflect the same build philosophy as all their hardware: functional, durable, and thoughtfully designed for the marine setting.</p><h3>Why Boaters Trust Sea-Dog Line</h3><ul style="list-style:disc"><li>Over 100 years of marine hardware expertise dating back to 1923</li><li>Headquarters in Everett, Washington, with a deep understanding of Pacific Northwest and offshore boating demands</li><li>A catalog of more than 2,400 products spanning virtually every marine hardware category</li><li>Products engineered for saltwater, UV exposure, and the vibration of on-water use</li><li>Trusted by recreational boaters, commercial operators, and marine riggers alike</li></ul><p>From rigging essentials to cockpit accessories and windshield systems, Sea-Dog Line remains one of the most complete and dependable marine hardware brands available today. Explore their full product range and find the right Sea-Dog components for your vessel.</p>

Part Number

520830
09/14/2036 11:04 AM
Sale Price

$17.81

In Stock (10+)

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Usually delivered within 2 days

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Product Details

The Sea-Dog Line 520830 is a 90-degree thru-hull fitting designed to allow water to pass in or out of a vessel for drainage applications above the waterline. This marine-grade fitting features a durable injection-molded polypropylene body combined with a corrosion-resistant 304 stainless steel stamped cap for long-lasting performance in harsh marine environments.

Key Features:

  • 90-degree angled design for efficient water flow and drainage
  • Injection-molded polypropylene body for strength and chemical resistance
  • 304 stainless steel cap resists corrosion in saltwater conditions
  • For use with hose connections above the waterline
  • Ideal for bilge pump discharge, livewell drainage, and washdown systems

Specifications:

  • Dimension A (Overall Height): 1-7/8"
  • Dimension B (Hose Barb Length): 7/8"
  • Dimension C (Body Diameter): 1-13/16"
  • Dimension D (Flange Diameter): 3-7/16"
  • Dimension E (Cap Diameter): 1-15/16"
  • Dimension F (Thread Length): 5/8"

This thru-hull fitting provides a reliable connection point for marine drainage systems and works great in conjunction with standard marine-grade hoses for versatile onboard applications.

Great experience, fast shipping

Fast shipping easy transaction!

Fast easy and reasonably priced

Would have gotten 5 stars but product info was not stated correctly.

I found good quality product more cheaper here. I installed the shocks. Did not have any problem.

This was very quick and pleasant to work with and I will use them again if needed.

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