Sea-Dog 316 Stainless Steel Antenna Mount Extension – 12" | SED-329532-1
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Sea-Dog 316 Stainless Steel Antenna Mount Extension – 12"
Add a clean, corrosion-proof foot of height to your marine antenna installation with this 12" antenna mount extension from Sea-Dog. Investment cast from 316 stainless steel — the same alloy used in offshore deck hardware — it provides the structural rigidity and saltwater resistance needed for a permanent, low-maintenance installation on any vessel.
The standard 1"-14 thread fits the vast majority of marine antenna bases and antennas, making this a straightforward drop-in riser for most existing setups. At 12", it's the right amount of elevation for clearing low obstructions, improving antenna line-of-sight, or simply getting the antenna above deck clutter without the bulk of a longer extension.
Key Features
- Investment cast 316 stainless steel – offshore-grade corrosion resistance
- Standard 1"-14 thread – compatible with most marine antenna bases and antennas
- 12" length for moderate elevation gain
- 1-1/16" outer diameter, 13/16" tube wall
- Suitable for permanent saltwater installations
- MPN: 329532-1
Parts Desk Insights
Best Use Case: This extension is ideal when your antenna base is mounted at deck level or on a cabin top and needs a modest height boost to clear a rail, windshield frame, or low arch — without the reach of a 24" extension. It's a popular choice on center consoles, walkarounds, and express cruisers where a short riser keeps the antenna visible and accessible without adding excessive leverage on the base. If 12" isn't enough clearance, see the Sea-Dog 316 SS Antenna Mount Extension – 24". For the base, pair with a Sea-Dog Stainless Steel Deck Mount Antenna Base or the Sea-Dog Heavy Duty Stainless Steel Deck Mount Antenna Mount. To keep the antenna shaft stable at speed, add a Sea-Dog Nylon Antenna Stand-Off Bracket.
Thread Note: Confirm your antenna base and antenna both use the standard 1"-14 thread before ordering. Non-standard thread bases will require an adapter.
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.