U.S. Customers: Orders shipped from Canada may be subject to U.S. import duties, taxes, and/or tariffs as assessed by U.S. Customs and your carrier. These charges are not included in our product prices or shipping rates. You are responsible for any duties/tariffs/fees due on delivery or prior to delivery.
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Premium Marine Quality Parts

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Sea-Dog 337165Bulk Screw Out Deck Platet, 6 Black - 337165 - 354-337165Bulkf1

Sea-Dog Line, Lines & Rigging
$29.59

Sea-Dog® Screw-Out Deck Plates are molded to the highest standards using top quality UV stabilizers and antioxidants. When installing, use silicone sealant on hull or deck surface. Keep threads clean with hot soapy water. Lubricate with Vaseline or Teflon grease. Installs with six #8 FH fasteners (not included). Avoid contact with acetone or strong solvents.

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Sea-Dog 3371651 Screw Out Deck Plate, 6" Black - 337165-1 - 354-3371651F1

Sea-Dog Line, Lines & Rigging
$34.69

Sea-Dog® Screw-Out Deck Plates are molded to the highest standards using top quality UV stabilizers and antioxidants. When installing, use silicone sealant on hull or deck surface. Keep threads clean with hot soapy water. Lubricate with Vaseline or Teflon grease. Installs with six #8 FH fasteners (not included). Avoid contact with acetone or strong solvents.

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Sea-Dog 337162 Screw Out Deck Plate With Internal Collar, 6-1/2", White - 337162 - 354-337162F1

Sea-Dog Line, Lines & Rigging
$32.29

Molded with a collar on the bottom to hold deck plate bags or other round containers. Injection molded ABS. Molded to the highest standard using top quality UV stabilizers and anti-oxidants. Use silicone sealant on hull or deck when installing the deck plate.

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Sea-Dog 337161 White Screw Out Deck Plate W/Clear Cover, 6-1/2" - 337161-1 - 354-3371611F1

Sea-Dog Line, Lines & Rigging
$37.39

The Sea-Dog® Screw-Out Deck Plate is constructed with UV stabilized injection molded ABS and feature a clear polycarbonate lid, allowing visual inspection of the watertight compartment without removing the lid. When installing, use silicone sealant on hull or deck surface. Lubricate with Vaseline or Teflon grease. Keep threads clean with hot, soapy water. Installs with six #8 FH fasteners (not included). Avoid contact with acetone or strong solvent.

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Sea-Dog 3371601 Screw Out Deck Plate, 6" White - 337160-1 - 354-3371601F1

Sea-Dog Line, Lines & Rigging
$34.39

Sea-Dog® Screw-Out Deck Plates are molded to the highest standards using top quality UV stabilizers and antioxidants. When installing, use silicone sealant on hull or deck surface. Keep threads clean with hot soapy water. Lubricate with Vaseline or Teflon grease. Installs with six #8 FH fasteners (not included). Avoid contact with acetone or strong solvents.

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Sea-Dog 3371551 Screw Out Deck Plate, 5" Black - 337155-1 - 354-3371551F1

Sea-Dog Line, Lines & Rigging
$29.99

Sea-Dog® Screw-Out Deck Plates are molded to the highest standards using top quality UV stabilizers and antioxidants. When installing, use silicone sealant on hull or deck surface. Keep threads clean with hot soapy water. Lubricate with Vaseline or Teflon grease. Installs with six #8 FH fasteners (not included). Avoid contact with acetone or strong solvents.

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Sea-Dog 337155 Screw Out Deck Plate, 5" Black - 337155 - 354-337155F1

Sea-Dog Line, Lines & Rigging
$26.19

Sea-Dog® Screw-Out Deck Plates are molded to the highest standards using top quality UV stabilizers and antioxidants. When installing, use silicone sealant on hull or deck surface. Keep threads clean with hot soapy water. Lubricate with Vaseline or Teflon grease. Installs with six #8 FH fasteners (not included). Avoid contact with acetone or strong solvents.

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Sea-Dog 337152 Screw Out Deck Plate With Internal Collar, 5-1/2", White - 337152 - 354-337152F1

Sea-Dog Line, Lines & Rigging
$26.99

Molded with a collar on the bottom to hold deck plate bags or other round containers. Injection molded ABS. Molded to the highest standard using top quality UV stabilizers and anti-oxidants. Use silicone sealant on hull or deck when installing the deck plate.

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Sea-Dog 3371501 Screw Out Deck Plate, 5" White - 337150-1 - 354-3371501F1

Sea-Dog Line, Lines & Rigging
$29.19

Sea-Dog® Screw-Out Deck Plates are molded to the highest standards using top quality UV stabilizers and antioxidants. When installing, use silicone sealant on hull or deck surface. Keep threads clean with hot soapy water. Lubricate with Vaseline or Teflon grease. Installs with six #8 FH fasteners (not included). Avoid contact with acetone or strong solvents.

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Sea-Dog 337146 Black Screw Out Deck Plate W/Clear Cover, 4-1/2" - 337146-1 - 354-3371461F1

Sea-Dog Line, Lines & Rigging
$30.89

The Sea-Dog® Screw-Out Deck Plate is constructed with UV stabilized injection molded ABS and feature a clear polycarbonate lid, allowing visual inspection of the watertight compartment without removing the lid. When installing, use silicone sealant on hull or deck surface. Lubricate with Vaseline or Teflon grease. Keep threads clean with hot, soapy water. Installs with six #8 FH fasteners (not included). Avoid contact with acetone or strong solvent.

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Sea-Dog 3371451 Screw Out Deck Plate, 4" Black - 337145-1 - 354-3371451F1

Sea-Dog Line, Lines & Rigging
$29.19

Sea-Dog® Screw-Out Deck Plates are molded to the highest standards using top quality UV stabilizers and antioxidants. When installing, use silicone sealant on hull or deck surface. Keep threads clean with hot soapy water. Lubricate with Vaseline or Teflon grease. Installs with six #8 FH fasteners (not included). Avoid contact with acetone or strong solvents.

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Sea-Dog 337142 Screw Out Deck Plate With Internal Collar, 4-1/2", White - 337142 - 354-337142F1

Sea-Dog Line, Lines & Rigging
$26.79

Molded with a collar on the bottom to hold deck plate bags or other round containers. Injection molded ABS. Molded to the highest standard using top quality UV stabilizers and anti-oxidants. Use silicone sealant on hull or deck when installing the deck plate.

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Sea-Dog 3371401 Screw Out Deck Plate, 4" White - 337140-1 - 354-3371401F1

Sea-Dog Line, Lines & Rigging
$29.59

Sea-Dog® Screw-Out Deck Plates are molded to the highest standards using top quality UV stabilizers and antioxidants. When installing, use silicone sealant on hull or deck surface. Keep threads clean with hot soapy water. Lubricate with Vaseline or Teflon grease. Installs with six #8 FH fasteners (not included). Avoid contact with acetone or strong solvents.

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Sea-Dog 3364131 Low Profile Pop-Out Deck Plate, A: 8" , B:7-1/4", C=6-1/4", D: 3/16", Black, #8 Fh - 336413-1 - 354-3364131F1

Sea-Dog Line, Lines & Rigging
$43.49

Features an integrated, pop-up lever to make opening and closing a snap. The concealed fasteners give a smooth look with a very low profile (.1875"), this deck plate is great for tight places and high traffic areas. Rubber O-ring provides a watertight seal and three-tab snap provides a secure fit. Constructed of UV resistant injection molded Polypropylene for its structural strength, as well as weather and corrosion resistance. Installs with six #8 FH fasteners (not included).

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Sea-Dog 3364121 Low Profile Pop-Out Deck Plate, A: 8" , B:7-1/4", C=6-1/4", D: 3/16", White, #8 Fh - 336412-1 - 354-3364121F1

Sea-Dog Line, Lines & Rigging
$43.49

Features an integrated, pop-up lever to make opening and closing a snap. The concealed fasteners give a smooth look with a very low profile (.1875"), this deck plate is great for tight places and high traffic areas. Rubber O-ring provides a watertight seal and three-tab snap provides a secure fit. Constructed of UV resistant injection molded Polypropylene for its structural strength, as well as weather and corrosion resistance. Installs with six #8 FH fasteners (not included).

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Sea-Dog 3364111 Low Profile Pop-Out Deck Plate, A: 6" , B:5-1/4", C=4-1/8", D: 3/16", Black, #8 Fh - 336411-1 - 354-3364111F1

Sea-Dog Line, Lines & Rigging
$36.19

Features an integrated, pop-up lever to make opening and closing a snap. The concealed fasteners give a smooth look with a very low profile (.1875"), this deck plate is great for tight places and high traffic areas. Rubber O-ring provides a watertight seal and three-tab snap provides a secure fit. Constructed of UV resistant injection molded Polypropylene for its structural strength, as well as weather and corrosion resistance. Installs with six #8 FH fasteners (not included).

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Sea-Dog 3364101 Low Profile Pop-Out Deck Plate, A: 6" , B:5-1/4", C=4-1/8", D: 3/16", White, #8 Fh - 336410-1 - 354-3364101F1

Sea-Dog Line, Lines & Rigging
$36.19

Features an integrated, pop-up lever to make opening and closing a snap. The concealed fasteners give a smooth look with a very low profile (.1875"), this deck plate is great for tight places and high traffic areas. Rubber O-ring provides a watertight seal and three-tab snap provides a secure fit. Constructed of UV resistant injection molded Polypropylene for its structural strength, as well as weather and corrosion resistance. Installs with six #8 FH fasteners (not included).

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Sea-Dog 3316011 Drain Cover, 2-1/2" - 331601-1 - 354-3316011F1

Sea-Dog Line, Lines & Rigging
$6.99

Stamped 304 StainlessVent Area .85 Sq. In.Fasteners: #6 RH

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Sea-Dog 331600 Drain Cover, 3-1/4" - 331600-1 - 354-3316001F1

Sea-Dog Line, Lines & Rigging
$9.79

Stamped 304 StainlessVent Area 2.11 Sq. In.Fasteners: #6 RH

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Sea-Dog 331455 Butterfly Vent - Side Knob, 5" - 331455 - 354-331455F1

Sea-Dog Line, Lines & Rigging
$35.59

Constructed of corrosion resistant 304 stainless steel. Promote air flow helping to preventing mold and mildew. Features a side knob that allows for easy adjustment of the opening. Fasteners sold separately.

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Sea-Dog 331440 Butterfly Vent - Center Knob, 4" - 331440-1 - 354-3314401F1

Sea-Dog Line, Lines & Rigging
$23.49

Constructed of corrosion resistant 304 stainless steel these butterfly vents promote air flow to prevent mold, mildew and associated odors. Features a center knob that allows for easy adjustment of the opening.

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Sea-Dog 3314251 Round Louvered Vent, 5" - 331425-1 - 354-3314251F1

Sea-Dog Line, Lines & Rigging
$16.18

Constructed of corrosion resistant stamped 304 stainless steel these round air ventilation louvers allow air in while keeping water out. Installs with four #6 FH fasteners (not included).

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Sea-Dog 331424 Round Louvered Vent, 4" - 331424 - 354-331424F1

Sea-Dog Line, Lines & Rigging
$8.83

Constructed of corrosion resistant stamped 304 stainless steel these round air ventilation louvers allow air in while keeping water out. Installs with four #6 FH fasteners (not included).

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Northern Marine Canada
Our products are shipped from Canada!
Parts Warehouse:
Toronto, Ontario, Canada
Head Office:
Kingston, Ontario

About Us

Northern Marine is a Canadian supplier of premium marine and RV parts and accessories from top industry brands. We focus on quality, accurate listings, and dependable fulfillment so you can maintain, repair, and outfit your boat or RV with confidence.

Our goal is simple: get you the right parts, shipped fast, with straightforward service you can count on.