Sea-Dog Stainless Steel Deck Plate - 3"

The Sea-Dog Stainless Steel Deck Plate – 3" is a marine-grade access fitting engineered for permanent installation on boat decks, cabin roofs, and sealed compartments where inspection or maintenance access is required. Built from stainless steel, this 3-inch deck plate resists corrosion in salt-air and freshwater environments, making it the standard choice for offshore vessels, fishing boats, and commercial marine applications where deck hardware must withstand extended UV exposure and constant moisture.

This deck plate operates with Sea-Dog Deck Plate Keys (models 335680 or 335699, sold separately) to provide secure, removable access to below-deck systems and storage. The 3-inch opening accommodates standard marine inspection ports and is designed for flush mounting on flat or slightly curved deck surfaces. Installation requires the use of anti-seize lubricant on all threads to prevent galling—a critical step that protects the stainless steel fasteners from corrosion bonding and ensures the plate can be removed for future maintenance. The relatively low weight of 1.15 lbs makes it suitable for both deck and cabin applications without structural reinforcement concerns.

This product serves marine owners, boatbuilders, and professional marine maintenance technicians who need reliable, corrosion-resistant deck access hardware. Whether installing on a new build, upgrading older deck systems, or maintaining existing installations, the stainless steel construction eliminates the need for paint touch-ups and galvanic isolation concerns common with cheaper alternatives. Sea-Dog's reputation in the marine hardware sector is built on this kind of dependable engineering—hardware that performs in real saltwater conditions, season after season.