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.
Packed and shipped within Canada!

Premium Marine Quality Parts

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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 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 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 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 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 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 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 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 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 3371981 Deck Plate Lanyard - 337198-1 - 354-3371981F1

Sea-Dog Line, Lines & Rigging
$9.39

12" Lanyard is designed to retain deck plate lids. Fits all Sea-Dog® Deck Plates. Constructed of corrosion resistant 304 stainless steel. Attaches to lid with #6 RH fastener (included) and to the interior hull with a #10 RH fastener (not included).

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Sea-Dog 337310 Thru Vent, White - 337310 - 354-337310F1

Sea-Dog Line, Lines & Rigging
$3.39

Designed for cabin or bilge ventilation. Constructed of injection molded polypropylene they are UV resistant. For use with 3" exhaust hose. Installs with four #8 FH fasteners (not included). Vent area 3.04 square inches.

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Sea-Dog 3373161 Flush Hose Vent, 3" Hose, A: 2-13/16", B: 2-3/4", C:3-11/16", D:5/16" ,Hose/ Hole Size : Up To 3", White - 337316-1 - 354-3373161F1

Sea-Dog Line, Hoses, Clamps & Fittings
$5.79

Flush Thru Vents are designed for cabin or bilge ventilation. Constructed of UV resistant injection molded ABS. For use with 3" exhaust hose. Installs with four #8 FH fasteners (not included). Avoid contact with acetone or strong solvents.

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Sea-Dog 3373161 Flush Hose Vent, A: 2-13/16" , B:2-3/4", C:3-11/16", D:5/16", Hose/ Hole Size: Up To 3", Black - 337326-1 - 354-3373261F1

Sea-Dog Line, Hoses, Clamps & Fittings
$5.59

Flush Thru Vents are designed for cabin or bilge ventilation. Constructed of UV resistant injection molded ABS. For use with 3" exhaust hose. Installs with four #8 FH fasteners (not included). Avoid contact with acetone or strong solvents.

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Sea-Dog 337320 Thru Vent, Black - 337320 - 354-337320F1

Sea-Dog Line, Lines & Rigging
$3.30

Designed for cabin or bilge ventilation. Constructed of injection molded polypropylene they are UV resistant. For use with 3" exhaust hose. Installs with four #8 FH fasteners (not included). Vent area 3.04 square inches.

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Sea-Dog 3373801 Louvered Vent, Black, A: 1-7/8", B:4-1/4", C:3", D:5-1/2", #8 Fh - 337380-1 - 354-3373801F1

Sea-Dog Line, Lines & Rigging
$7.29

Injection molded ABS.

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Sea-Dog 3373811 Louvered Vent, White, A: 1-7/8", B:4-1/4", C:3", D:5-1/2",#8 Fh - 337381-1 - 354-3373811F1

Sea-Dog Line, Lines & Rigging
$7.44

Injection molded ABS.

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Sea-Dog 337400 Louvered Vent, Black, A:3-11/16" , B:9", C:4-7/8", D:10-1/8" ,#8 Fh - 337400-1 - 354-3374001F1

Sea-Dog Line, Lines & Rigging
$14.31

Injection molded ABS.

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Sea-Dog 3374011 Louvered Vent, White, A:3-11/16" , B:9", C:4-7/8", D:10-1/8" , #8 Fh - 337401-1 - 354-3374011F1

Sea-Dog Line, Lines & Rigging
$14.65

Injection molded ABS.

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Sea-Dog 337416 Flush Hose Vent, 4" Hose, A:3-9/16" , B:3-3/4", C:4-15/16", D:5/16", Hose/ Hole Size:Up To 4", White - 337416-1 - 354-3374161F1

Sea-Dog Line, Hoses, Clamps & Fittings
$9.85

Flush Thru Vents are designed for cabin or bilge ventilation. Constructed of UV resistant injection molded ABS. For use with 4" exhaust hose. Installs with four #8 FH fasteners (not included). Avoid contact with acetone or strong solvents.

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Sea-Dog 337426 Flush Hose Vent, Hose, A:3-9/16" , B:3-3/4", C:4-15/16", D:5/16", Hose/ Hole Size:Up To 4", Black - 337426-1 - 354-3374261F1

Sea-Dog Line, Hoses, Clamps & Fittings
$9.79

Flush Thru Vents are designed for cabin or bilge ventilation. Constructed of UV resistant injection molded ABS. For use with 4" exhaust hose. Installs with four #8 FH fasteners (not included). Avoid contact with acetone or strong solvents.

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Sea-Dog 337500 Louvered Vent, Black - 337500 - 354-337500F1

Sea-Dog Line, Lines & Rigging
$6.96

Louvered Vents are designed to promote air circulation and prevent mold, mildew, and unpleasant odors. Ideal for cabin doors, lockers, dock boxes, etc. Easy to install with four #8 FH fasteners (not included). UV resistant injection molded ABS construction. Avoid contact with acetone or strong solvents.

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Sea-Dog 337501 Louvered Vent, White - 337501 - 354-337501F1

Sea-Dog Line, Lines & Rigging
$7.18

Louvered Vents are designed to promote air circulation and prevent mold, mildew, and unpleasant odors. Ideal for cabin doors, lockers, dock boxes, etc. Easy to install with four #8 FH fasteners (not included). UV resistant injection molded ABS construction. Avoid contact with acetone or strong solvents.

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Sea-Dog 3375901 Flush Thru Vent, 3" Hose, Stainless - 337590-1 - 354-3375901F1

Sea-Dog Line, Hoses, Clamps & Fittings
$54.79

Flush Thru Vent designed for cabin or bilge ventilation. For use with 3" exhaust hose. Constructed of corrosion resistant investment cast 316 stainless steel. Installs with four #8 FH fasteners (not included).

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.