Sea-Dog Cast 316 Stainless Deck Fill Key – 1-3/16" Hole Centers
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You have 30 days to request a return. All sale items are final sale.
Sea-Dog Cast 316 Stainless Deck Fill Key – 1-3/16" Hole Centers
A precision-fit deck fill key investment cast from 316 stainless steel — the higher-grade marine alloy chosen for its superior resistance to salt, moisture, and chlorine compared to standard 304 stainless. Designed for fill caps with 1-3/16" holes on center, this key delivers a clean, tight engagement that protects the cap's drive recesses from wear over years of use.
- Investment cast 316 stainless steel — greater corrosion resistance than formed 304 SS; holds up in harsh saltwater environments
- Precision fit for 1-3/16" hole-on-center fill caps — works with all fill caps using this standard spacing, including Sea-Dog hose deck fills and most compatible brands
- Investment casting process — produces tighter dimensional tolerances than stamped or formed keys, for a more secure fit and less cap wear
- Compact and lightweight — easy to stow alongside the fill hardware or in a cockpit locker
Parts Desk Insights
Best use case: This is the right key when the boat has quality cast stainless deck fill hardware and the owner wants a matched, long-lasting tool rather than a generic universal key. The 316 SS construction makes it particularly well-suited for offshore or bluewater boats where hardware is exposed to sustained saltwater spray and the higher corrosion resistance of 316 over 304 is worth specifying. It's also the correct choice as a replacement key for Sea-Dog hose deck fills — the 1-3/16" hole-on-center spec matches that hardware family directly.
Pair with Sea-Dog deck fill hardware: Sea-Dog Locking Deck Fill – Diesel, Sea-Dog Locking Diesel Hose Deck Fill w/Keys, 1-1/2" Hose, Sea-Dog Locking Gas Hose Deck Fill w/Keys, 1-1/2" Hose, or Sea-Dog Angled Hose Deck Fill Replacement Cap. For a formed 304 stainless key with broader cap compatibility, see the Sea-Dog Deck Fill Key – Formed 304 Stainless Steel. For a multi-tool key with screwdriver and hex wrench functions, see the Sea-Dog Universal Deck Fill Key & Multi-Tool – 304 Stainless Steel. For adjustable-fit keys, see the Sea-Dog Adjustable Bronze Deck Plate Key – 6" Max.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.