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Marine Hardware

Choose Marine Hardware That Fits the Boat and the Job

Shop marine hardware for repair, replacement, refit, and new-installation projects. The right fitting depends on more than appearance: confirm the mounting footprint, hole spacing, fastener size, material, load direction, surface thickness, and exposure to saltwater before ordering.

What to Check Before You Buy

  • Material: Match stainless steel, bronze, aluminum, or polymer hardware to the application and surrounding metals.
  • Measurements: Compare overall dimensions, cutout size, bolt pattern, thread type, and required clearance.
  • Load and use: Hardware used for lifting, towing, anchoring, seating, or safety equipment must be rated and installed for that specific purpose.
  • Corrosion control: Dissimilar metals can accelerate galvanic corrosion. Use suitable isolation, sealant, and fasteners for the boat and environment.
  • Installation: Through-bolting, backing plates, bedding compounds, and access behind the mounting surface may be required.

Plan the Complete Installation

Hardware projects often connect with Boat Outfitting, Anchoring & Docking, Marine Plumbing & Ventilation, Marine Electrical, and Marine Lighting. Review the product specifications and manufacturer instructions before drilling or replacing an existing fitting. For structural, below-waterline, lifting, or safety-critical work, professional installation is recommended.

Marine Hardware Buying Questions

Can I replace boat hardware using only the overall size?

No. Verify the full footprint, mounting-hole pattern, fastener diameter, thread, surface thickness, clearance, and intended load. Similar-looking parts may not be direct replacements.

Which metal is best for saltwater use?

There is no universal choice. The correct material depends on strength, immersion, surrounding metals, maintenance, and manufacturer requirements. Marine-grade stainless steel and bronze are common, but incorrect metal combinations can cause rapid corrosion.

Do I need a backing plate?

Hardware exposed to high or repeated loads often needs load-spreading support. Follow the boat builder and hardware manufacturer instructions; consult a qualified marine technician when the structure or rating is uncertain.

Need help narrowing the options? Use the category filters and product specifications, then contact MarineWaze with the application, measurements, boat material, and existing part number.

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  • Sea-Dog Stainless Steel Round Louvered Vent - 4" [331424-1]
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    Sea-Dog Stainless Steel Round Louvered Vent - 4" [331424-1]

    Sea-Dog

    $8.95
    Stainless Steel Round Louvered Vent - 4" Round Louvered Vents allow air in while keeping water out. Installs with four #6 FH fasteners (not included). Corrosion resistant stamped 304 stainless steel...
    $8.95
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    Qty in Cart: 0
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    $8.95
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  • Sea-Dog Stainless Steel Midget Vent - Medium [331370-1]
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    Sea-Dog Stainless Steel Midget Vent - Medium [331370-1]

    Sea-Dog

    $4.65
    Stainless Steel Midget Vent - Medium Midget Vents provide a splash-proof opening through transoms, cabin sides, etc. Great for routing cables and wires or for covering thru-hull openings to shield...
    $4.65
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    $4.65
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  • Sea-Dog Stainless Steel Midget Vent - Small [331360-1]
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    Sea-Dog Stainless Steel Midget Vent - Small [331360-1]

    Sea-Dog

    $4.25
    Stainless Steel Midget Vent - Small Midget Vents provide a splash-proof opening through transoms, cabin sides, etc. Great for routing cables and wires or for covering thru-hull openings to shield...
    $4.25
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    Qty in Cart: 0
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    $4.25
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  • Sea-Dog Stainless Steel Clam Shell Vent - Large [331350-1]
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    Sea-Dog Stainless Steel Clam Shell Vent - Large [331350-1]

    Sea-Dog

    MSRP: $72.55
    $54.99
    Stainless Steel Clam Shell Vent - Large Large Clam Shell Ventilators provide splash protection for vent holes, wires, cable runs, or blower-exhaust hose openings. Corrosion resistant 304 stamped...
    MSRP: $72.55
    $54.99
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    MSRP: $72.55
    $54.99
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  • Sea-Dog Stainless Steel Cowl Vent [331330-1] Sea-Dog Stainless Steel Cowl Vent [331330-1]
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    Sea-Dog Stainless Steel Cowl Vent [331330-1]

    Sea-Dog

    MSRP: $61.95
    $43.99
    Stainless Steel Cowl Vent Cowl Vent provides fresh air below decks by trapping air that comes across the top deck and forcing it into your boat's cabin or interior. Stamped 304 stainless steel...
    MSRP: $61.95
    $43.99
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    MSRP: $61.95
    $43.99
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  • Sea-Dog Stainless Steel Stud Mount Flanged Hand Rail w/Mounting Flange - 10" [254209-1]
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    Sea-Dog Stainless Steel Stud Mount Flanged Hand Rail w/Mounting Flange - 10" [254209-1]

    Sea-Dog

    MSRP: $49.95
    $40.99
    Stainless Steel Stud Mount Flanged Hand Rail with Mounting Flange - 10" These Stud Mounted Flanged Hand Rail features integral 5/16”-18 threaded studs and installs with two 5/16”-18 nuts (not...
    MSRP: $49.95
    $40.99
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    MSRP: $49.95
    $40.99
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  • Sea-Dog Smooth Quarter Turn Deck Plate - White - 6" [336160-1]
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    Sea-Dog Smooth Quarter Turn Deck Plate - White - 6" [336160-1]

    Sea-Dog

    MSRP: $26.25
    $22.99
    Smooth Quarter Turn Deck Plate - White - 6" The Sea-Dog® Quarter-Turn Deck Plate is constructed of UV stabilized ABS. Features a new locking system that prevents over tightening, jamming, and cross...
    MSRP: $26.25
    $22.99
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    Qty in Cart: 0
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    MSRP: $26.25
    $22.99
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  • Sea-Dog Smooth Quarter Turn Deck Plate - Black - 5" [336155-1]
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    Sea-Dog Smooth Quarter Turn Deck Plate - Black - 5" [336155-1]

    Sea-Dog

    MSRP: $17.25
    $16.99
    Smooth Quarter Turn Deck Plate - Black - 5" The Sea-Dog® Quarter-Turn Deck Plate is constructed of UV stabilized ABS. Features a new locking system that prevents over tightening, jamming, and cross...
    MSRP: $17.25
    $16.99
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    Qty in Cart: 0
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    MSRP: $17.25
    $16.99
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