Sea-Dog 316 SS Deck Fill Replacement Cap, 1-1/2 In

Lost the cap off your deck fill? Or watched the old one pit, discolor, and finally seize up after too many seasons of salt spray? This is the genuine Sea-Dog replacement cap for their 1-1/2 inch deck fills, and it's a simple fix that gets your fill point sealed and looking right again. It's built from 316 stainless steel, and it comes with its own attachment chain so the cap stays tethered to the fill every time you top off.

Here's the thing about deck fill caps. They take a beating. They sit out in the weather, they get stepped on, they get cross-threaded by someone in a hurry at the fuel dock. Over time the finish goes and the threads wear. When that happens you don't need to replace the whole deck fill, you just need the cap. That's exactly what this is. It threads straight onto Sea-Dog deck fills with part numbers 351320 through 351323, so if you've got one of those on your boat, this is the match.

The 316 stainless matters more than people think. It's the grade that holds up to chloride and salt, the stuff that turns lesser stainless brown and streaky within a season. On a cap that lives right at the deck, exposed to spray and standing water, that corrosion resistance is what keeps it turning smoothly years down the road. You want the cap you can still unthread by hand in year five, not the one you're fighting with pliers.

The attachment chain is the small detail that saves you a real headache. Anyone who's fueled up in a chop knows how easy it is to set a loose cap down and lose it over the side. Tethered to the fill, this one stays put. Keep in mind this is the cap and chain only, not the full deck fill body, so you'll want to confirm your existing fill is one of the 351320 series before you order.