Sea-Dog Red Gas Deck Fill Replacement Cap 357090-1

The Sea-Dog 357090-1 is a red replacement cap for gas hose deck fills, designed to restore a secure, easy-to-open seal on your boat's gas fill fitting. The cap features a built-in key for effortless removal - lock the key in the upright position for quick access, or recess it into the cap for a flush surface when closed. The cap diameter is 1-7/8 inches, with an 11-1/2 NPSM straight thread pitch, matching Sea-Dog's hose deck fill fittings.

Color-coding is a core safety feature of this cap: the red finish clearly marks the fitting as gas, helping prevent dangerous and costly misfueling that can occur when fill points are not clearly identified. The cap is constructed of fiberglass filled injection molded nylon, so it contains no metal and does not require grounding to the boat's electrical system. It includes an attachment chain to keep the cap tethered to the deck fill body during use. This is a cap-only replacement part; the deck fill body and hose are sold separately.

Specifications

• Brand: Sea-Dog
• Manufacturer Part Number: 357090-1
• Product Type: Deck Fill Replacement Cap
• Fill Type: Gas
• Color: Red
• Cap Diameter: 1-7/8 inches
• Thread Pitch: 11-1/2 NPSM straight
• Material: Fiberglass filled injection molded nylon
• Weight: 0.096 pounds
• UPC: 035514357043
• Attachment Chain: Included
• Grounding Required: No (contains no metal)

Fitment

Fits Sea-Dog hose deck fills using an 11-1/2 NPSM straight thread with a 1-7/8 inch cap diameter, gas fill applications.

Frequently Asked Questions

What is the Sea-Dog 357090-1 used for? It is a replacement cap for a gas hose deck fill, sealing the gas fill fitting on a boat's deck and allowing quick access via its built-in key.

Why is this cap red? Red identifies the fitting as gas on Sea-Dog's color-coded deck fill system, which helps prevent misfueling and the damage that can result from filling the wrong tank.

Does the 357090-1 cap include the deck fill body? No, 357090-1 is the cap only. Sea-Dog sells the deck fill body separately, so this part is for replacing a lost or damaged gas cap on an existing fitting.

What thread size does this cap use? The 357090-1 cap has a 1-7/8 inch cap diameter with an 11-1/2 NPSM straight thread pitch, matching Sea-Dog hose deck fill fittings.

What material is the cap made from? It is constructed of fiberglass filled injection molded nylon, a rigid, corrosion-resistant material that does not require electrical grounding since it contains no metal.

Does the gas cap include an attachment chain? Yes, the 357090-1 gas replacement cap includes an attachment chain to keep it tethered to the deck fill body.

How much does the 357090-1 cap weigh? The cap weighs 0.096 pounds.

How do I remove the cap? The 357090-1 cap has a built-in key: lift and lock the key upright to turn and remove the cap, or press it flush into the cap's surface once the cap is closed.

Is this cap compatible with pressurized oil injection systems? No. Sea-Dog deck fill caps and fittings, including 357090-1, are not designed to work with pressurized oil injection systems.

What is the UPC for this product? The Sea-Dog 357090-1 red gas replacement cap has UPC 035514357043.

How is this different from the oil, diesel, water, or waste caps? The 357090-1 is the red gas version; Sea-Dog also makes black oil, green diesel, blue water, and black waste replacement caps in the same style, distinguished by color for fill identification.