Sea-Dog Emergency Deck Fill Plug

The Sea-Dog Emergency Deck Fill Plug (MPN 357390-1) is a critical backup component for marine fuel and water systems aboard vessels of all sizes. This emergency plug is engineered for situations where your original deck fill cap is lost, damaged, or inaccessible—situations that demand an immediate, field-proven solution to prevent contamination and fuel loss. Whether you're operating commercial fishing vessels, military patrol boats, or recreational watercraft, this plug addresses a real operational gap that standard marine inventory often overlooks.

Constructed from fuel-resistant Nitrile-Buna rubber, the Sea-Dog Emergency Deck Fill Plug is designed to fit most standard 1-1/2" hose deck fills with a secure, compression-fit design that prevents leakage during vessel operation. The material composition provides chemical resistance to gasoline, diesel, and marine additives, ensuring reliability even in harsh saltwater and freshwater environments. The compact 5 x 3 x 7 inch footprint and lightweight 0.3 lb design make this an ideal emergency kit addition—easily stowed in any crew compartment, engine room, or tactical equipment locker without consuming valuable storage space.

This plug is rated for temporary emergency use until you can source and install your original equipment manufacturer (OEM) replacement cap. Deck maintenance personnel, marine technicians, and vessel commanding officers should maintain one of these plugs as part of standard emergency response inventory. Installation requires no tools—simply insert into the 1-1/2" deck fill opening and hand-tighten for an effective temporary seal. Proper sizing and material durability make this plug compatible with nearly all marine fuel and freshwater system configurations where standard deck fills are present.