Sea-Dog Stainless Steel Gas Deck Fill with Key, 1-1/2 Inch Hose, 351320K

The Sea-Dog 351320K is a stainless steel gas deck fill designed to give boaters a durable, corrosion-resistant fuel filling point on deck. Marked "Gas" on the body for clear fuel identification, it connects to a 1-1/2 inch hose and is built from investment cast 316 stainless steel, a grade chosen for its resistance to saltwater corrosion and long service life in marine environments. The slotted cap has a 1-7/8 inch diameter and uses an 11-1/2 NPSM straight thread pitch, and it opens and closes with the included stainless steel Deck Fill Key (351399), so no separate tool purchase is needed. An attachment chain keeps the cap tethered to the fitting, reducing the chance of it being dropped or lost overboard during fueling.

Installation is straightforward: the deck fill mounts with three #10 FH fasteners (not included) and is compatible with the standard 1-1/2 inch hose size used across many boats. Because this fitting is used for fuel, USCG regulations require a bonding wire be connected to prevent sparking, and a flange gasket (351349) is sold separately to complete a watertight seal at installation. Note that this is the GAS version of this deck fill; a WATER version using the same body style is sold separately under part number 351322K, so be sure to select the correct part number for your intended use.

Specifications

• Brand: Sea-Dog
• Manufacturer Part Number: 351320K
• Fluid Marking: Gas
• Hose Size: 1-1/2 inch
• Material: Investment Cast 316 Stainless Steel
• Cap Diameter: 1-7/8 inch
• Thread Pitch: 11-1/2 NPSM straight
• Dimension A: 3 inch
• Dimension B: 3 inch
• Fastener: #10 FH (three required, not included)
• Includes: Stainless Deck Fill Key (351399), attachment chain
• Weight: 0.96 pounds
• UPC: 035514352390
• Standard Pack: 1 each

Fitment

Universal fit for boats using a standard 1-1/2 inch fuel fill hose.

Replaces (OEM)

No OEM cross-reference numbers are listed for this part.

Frequently Asked Questions

What is the Sea-Dog 351320K used for? The 351320K is a stainless steel deck fill used to fill a boat's fuel tank from the deck, marked "Gas" to identify it as a fuel fitting rather than a water fill.

What hose size does this deck fill connect to? This deck fill is sized for a 1-1/2 inch hose connection.

Does the 351320K come with a key to open the cap? Yes, a stainless steel Deck Fill Key (351399) is included and is required to open and close the slotted cap on the 351320K.

What material is the Sea-Dog 351320K made from? It is constructed of investment cast 316 stainless steel, chosen for its resistance to corrosion in marine environments.

What are the cap diameter and thread specs? The cap diameter is 1-7/8 inch, with an 11-1/2 NPSM straight thread pitch.

How is the 351320K installed? It installs with three #10 FH fasteners, which are not included, and mounts flush to the deck at the marked location.

How much does the 351320K weigh? The Sea-Dog 351320K deck fill weighs 0.96 pounds.

Is a gasket included with the 351320K? No, the flange gasket (351349) is sold separately from the 351320K deck fill and should be ordered to complete a watertight installation.

Is there a bonding wire requirement for this deck fill? Yes, USCG regulations require a bonding wire be connected at the 351320K to prevent sparking, since it is a fuel fitting.

What is the difference between the 351320K and the 351322K? The 351320K is marked for Gas while the 351322K is the equivalent deck fill marked for Water; they share the same body style but are separate part numbers, so order the one matching your intended fluid.

Is a locking version of this deck fill available? Yes, Sea-Dog offers a Locking Hose Deck Fill (351320L) for the same 1-1/2 inch gas hose application, which is a different part number from the standard 351320K.

Does the cap stay attached when opened? Yes, the 351320K includes an attachment chain that keeps the cap tethered to the fitting so it is not lost when opened for fueling.