Sea-Dog T-Top Drain Plug – 1/2" NPT, Hand-Tighten, Single
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
Hand-Tighten 1/2" NPT Drain Plug with Square T-Top
This 1/2" NPT tapered thread drain plug delivers a reliable watertight seal in cockpit drains, bilge fittings, and other threaded drain applications. The square T-top design allows for fast hand-tightening and removal without tools — ideal for drains that need to be opened and closed regularly at the ramp or during maintenance.
The tapered NPT thread creates a self-sealing fit as the plug is tightened, providing a secure seal without the need for additional sealant in most applications. Sold individually.
Key Features
- 1/2" NPT tapered thread — self-sealing fit
- Square T-top for fast, tool-free hand tightening and removal
- Provides a watertight seal in threaded drain fittings
- Compatible with Sea-Dog 520050 drain fittings
- Sold individually (single plug)
Specifications
- SKU: 354-5200431
- Thread: 1/2" NPT tapered
- Top Style: Square T-top
- Weight: 57 g
Parts Desk Insights
Best Use Case: The right replacement when the plug on a Sea-Dog 520050 drain fitting is lost or damaged, or when you need a hand-removable drain plug for a frequently accessed drain point. The T-top makes this plug particularly practical for cockpit drains that are opened at the ramp and closed before launching — no tools needed. For a paired set, see the Sea-Dog Replacement Drain Plug for Cockpit Drain Fitting – 1-1/8" Tube, Pair. For bulk nylon plug stock, see the Sea-Dog Replacement Nylon Drain Plug – 1" Hole, Pack of 30. For a bronze garboard drain plug, see the Sea-Dog Bronze Replacement Plug for Garboard Drain Fitting.
Note: Confirm thread size and fitting compatibility before ordering. NPT threads are tapered and not compatible with straight-thread (NPS) fittings.
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.