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Sea-Dog Line 337140-1 Screw-Out Deck Plate 4 Inch White

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

337140-1
06/14/2036 11:58 PM
Sale Price

$15.32

In Stock (10+)

delivery box

Usually delivered within 2 days

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No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Sea-Dog Line 337140-1 is a 4-inch screw-out deck plate designed for marine applications, providing convenient access to storage compartments, fuel fills, or inspection areas on boats and watercraft. This white deck plate features a threaded design that allows for easy removal and secure sealing when closed.

Key Features:

  • Molded with premium UV stabilizers and antioxidants for superior weather resistance and longevity
  • Durable white plastic construction resists fading and degradation in harsh marine environments
  • Screw-out design provides watertight seal when properly installed
  • 4-inch diameter fits standard deck plate openings
  • Smooth threads for easy operation and secure closure

Installation and Maintenance:

  • Apply silicone sealant to hull or deck surface during installation to ensure waterproof seal
  • Clean threads regularly with hot soapy water to prevent buildup and ensure smooth operation
  • Lubricate threads with petroleum jelly or Teflon-based lubricant for optimal performance

This deck plate is ideal for both new installations and replacements on sailboats, powerboats, RVs, and other marine vessels requiring reliable deck access solutions.

Products specifications

Color

White

Diameter: Interior

4-7/16"

Installation Hole Size

4-1/2"

O.D.

5-3/4"

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