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Sea-Dog Line 520021-5 Replacement Nylon Drain Plug 1 Inch 30 Pack

Manufacturer

Sea-Dog Line

<p>For over a century, Sea-Dog Line has stood as a cornerstone of the marine hardware industry, delivering innovative solutions that meet the demanding needs of recreational and commercial boaters. Founded in the early 1920s by entrepreneur Hans "Action" Broson Sneve, the company began with a unique sales approach—showcasing marine hardware aboard a 55-foot cruiser that sailed from Alaska to Mexico. This hands-on philosophy continues to shape Sea-Dog's commitment to producing hardware that performs reliably in the harshest saltwater environments.</p><h3>Industry-Leading Marine Hardware Manufacturing</h3><p>Based in Everett, Washington, Sea-Dog Corporation operates a 75,000-square-foot warehouse stocking over 8 million parts and runs an injection molding facility with 16 machines producing more than 17 million components annually. The company's extensive product line spans anchoring systems, deck hardware, electrical components, plumbing fittings, and lighting solutions—all engineered with marine-grade materials like stainless steel, brass, and UV-resistant polymers. Sea-Dog's recognition as a multiple-time NMDA Supplier of the Year underscores the brand's excellence in both product quality and customer service, while their on-staff ABYC-certified marine technician provides invaluable installation and technical support.</p><h3>Premium Marine Components for Every Vessel</h3><p>Sea-Dog's <a href="/7549-sea-dog-line-windshield-washers-wipers-replacement-motors-201195">windshield washers, wipers, and replacement motors</a> deliver crystal-clear visibility during inclement weather, with both manual and electric options featuring corrosion-resistant stainless steel arms and UV-stable blades designed specifically for marine windshield applications. Their <a href="/7549-sea-dog-line-electric-horns-200351">electric horns</a> include the popular MaxBlast line, which passed rigorous 600-hour salt spray testing while meeting US Coast Guard COLREGS and ABYC standards for audible warning devices. For fuel and water system integrity, Sea-Dog's <a href="/7549-sea-dog-line-deck-fills-200307">deck fills</a> provide secure, leak-free access points constructed from durable stainless steel with snap-in designs that resist corrosion in saltwater environments.</p><p>When maneuvering in low-light conditions, Sea-Dog's <a href="/7549-sea-dog-line-docking-lights-200335">docking lights</a> offer bright LED illumination with minimal power draw, featuring injection-molded housings that withstand impacts and temperature extremes. Proper airflow is essential for preventing moisture buildup below deck, and Sea-Dog's <a href="/7549-sea-dog-line-hose-and-cowl-vents-200534">hose and cowl vents</a> deliver reliable ventilation with low-profile designs that include snap-in deck plates for bilge applications or dorade box compatibility for cabin use. Each product reflects Sea-Dog's century-long dedication to manufacturing hardware that recreational and professional mariners can trust, voyage after voyage.</p>

Part Number

520021-5
06/14/2036 5:40 PM
Sale Price

$37.30

In Stock (10)

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Usually delivered within 2 days

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No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Sea-Dog Line 520021-5 is a molded nylon replacement drain plug designed for marine applications requiring a reliable, watertight seal. This 30-piece pack provides excellent value for boat builders, marinas, and vessel owners who need multiple replacement plugs.

Key Features:

  • Molded nylon construction for durability and corrosion resistance in marine environments
  • Designed to fit securely in 1-inch diameter holes without requiring additional fasteners
  • Integrated ridge design on the plug body provides secure retention and prevents accidental removal
  • Simple installation—just apply marine sealant and insert for a watertight seal
  • Convenient 30-piece pack for multiple installations or replacements

These drain plugs are ideal for bilge drains, livewell drains, bait tank applications, and other marine drainage points. The self-retaining ridge design eliminates the need for threaded fittings or additional hardware, making replacement quick and easy. For best results, apply marine-grade sealant around the plug before installation to ensure a completely watertight seal.

Products specifications

Description

Replacement Plug & Gasket

Quantity

30

Parts were in stock, shipping was lightning fast.. A pleasure to do business with!

Product was in stock and shipped quick! At a great price no less! What else can you ask for?! A+++

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quick and easy

quick and easy

I had a problem with one of the products i purchased and Autoplicity went above and beyond what most companies would do in such a case. I would definitely purchase from them again.

Great prices & fast shipping.

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Great price, fast shipping

Good so far...

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