Sea-Dog Locking Gas Deck Fill 351320L-1, 1-1/2 Inch Hose, 316 Stainless Steel

The Sea-Dog 351320L-1 Locking Hose Deck Fill secures a boat's gas fill point against fuel theft while providing the standard 1-1/2 inch hose connection used on most recreational fuel systems. The cap locks in place and spins freely once locked, so it cannot be forced or pried off; to open it, the owner turns the supplied key until the key hole lines up with the cap tabs. Two keys are included along with a cap attachment cable so the cap can't be misplaced dockside.

The deck fill body and cap are investment cast from 316 stainless steel, giving it strong resistance to salt-air corrosion and long-term durability in a marine environment. The cap measures 2-1/8 inches in diameter with an 11-1/2 NPSM straight thread pitch. The fitting is color-coded and marked with the international symbol for gasoline, making it easy to visually confirm the correct deck fill during fueling. Installation is with three #10 flat head fasteners (not included), and per USCG regulations a bonding wire must be connected to the fitting to prevent sparking during fueling.

This is the gas-specific version of Sea-Dog's Locking Hose Deck Fill line, built for 1-1/2 inch hose. Matching diesel and water versions, and a 2 inch hose version, are sold separately under their own part numbers.

Specifications

• Brand: Sea-Dog
• Manufacturer Part Number: 351320L-1
• Fuel Type: Gas
• Hose Size: 1-1/2 inch
• Cap Diameter: 2-1/8 inches
• Thread Pitch: 11-1/2 NPSM straight
• Dimension A: 3-1/4 inches
• Dimension B: 3-7/16 inches
• Fastener Type: #10 flat head (not included)
• Material: Investment Cast 316 Stainless Steel
• Lock Type: Key lock, includes two keys
• Included Components: Two keys, cap attachment cable
• Weight: 1.342 pounds
• Standard Pack: 1 each

Fitment

Universal fit for boats with a 1-1/2 inch gas fill hose and a standard deck fill mounting hole; not vehicle or engine specific.

Frequently Asked Questions

What size hose does this deck fill fit? The Sea-Dog 351320L-1 connects to 1-1/2 inch hose, the standard size used on most gas fuel fill lines.

Does this deck fill lock? Yes. The 351320L-1 has a locking cap that spins freely once locked, preventing it from being forced or pried open; two keys are included to unlock it.

What is the deck fill made of? It is investment cast from 316 stainless steel, chosen for its resistance to salt-air corrosion in marine use.

What are the cap dimensions and thread size? The cap on the 351320L-1 is 2-1/8 inches in diameter with an 11-1/2 NPSM straight thread pitch.

Are mounting fasteners included? No. The 351320L-1 installs with three #10 flat head fasteners that are purchased separately.

How do you know it's the gas version and not diesel or water? This part, 351320L-1, is color-coded and marked with the international symbol for gasoline; Sea-Dog sells matching diesel and water versions under different part numbers, so check the marking before ordering.

Is a bonding wire required? Yes. USCG regulations require a bonding wire to be connected to the deck fill to prevent sparking during fueling.

What comes in the box with the 351320L-1? The package includes the locking deck fill body and cap, two keys, and a cap attachment cable.

How much does this deck fill weigh? The Sea-Dog 351320L-1 weighs 1.342 pounds.

Can the cap or attachment cable be replaced separately? Yes. Sea-Dog offers a replacement non-locking cap (351391-1) and a replacement attachment cable (0P35105) for this deck fill line.

Is this a genuine Sea-Dog part? Yes, the 351320L-1 is a genuine Sea-Dog investment cast 316 stainless steel locking deck fill, not an aftermarket copy.

Will this fit a 2 inch hose instead of 1-1/2 inch? No. The 351320L-1 is built for 1-1/2 inch hose; Sea-Dog's 351330L is the 2 inch hose gas version.