T-H Marine Sure-Seal Screw-Out Deck Plate, 8"
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
T-H Marine Sure-Seal Screw-Out Deck Plate — 8"
The T-H Marine Sure-Seal is an 8-inch screw-out deck plate built around a fully overlapping lid and a positive o-ring seal — two features that work together to keep water out even when spray or rain is hitting the deck directly. The lid threads down over the outer flange rather than into it, eliminating the gap where most deck plates leak, and the o-ring compresses evenly around the full circumference for a consistent watertight fit every time.
No tools are required to open or close it, there are no visible mounting fasteners above deck, and the UV- and chemical-stable construction means the plate won’t yellow, crack, or degrade from fuel spills or prolonged sun exposure.
Features
- 8" screw-out closure with fully overlapping lid design
- Positive o-ring seal for a watertight fit
- No visible mounting fasteners above deck
- No tools required to open or close
- UV-stable and chemical-resistant construction
Best Use Cases
The Sure-Seal is the right choice for deck plate locations that are regularly exposed to spray, rain, or wash-down — fuel sender access ports, bilge inspection ports, and battery compartment covers where a positive watertight seal matters more than quick snap-fit convenience. The overlapping lid design makes it a step up from standard flush-fit screw-out plates in wet-area applications.
Parts Desk Insights
The 8" measurement refers to the plate’s outer diameter — confirm your cutout size before ordering, as the required hole diameter will be smaller than the OD. If you need a smaller screw-down option, see the T-H Marine Screw-Down Deck Plate, 5-5/8" OD. For a larger hatch-style opening from the same brand, see the T-H Marine Sure-Seal Non-Locking Access Hatch, 13" × 23-1/4". For a comparable 8" screw-out plate in white, see the Tempress 43390.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 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.