Sea-Dog 316 Stainless Steel Antenna Mount Extension – 12" | SED-329532
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You have 30 days to request a return. All sale items are final sale.
Sea-Dog 316 Stainless Steel Antenna Mount Extension – 12"
Raise your VHF, AIS, or GPS antenna above deck obstructions with this 12" antenna mount extension from Sea-Dog. Investment cast from 316 stainless steel — the marine-grade alloy — it delivers the corrosion resistance and structural strength needed for a permanent, low-maintenance installation in saltwater environments.
The standard 1"-14 thread fits the vast majority of marine antenna bases and antennas, making this a direct drop-in riser for most existing setups. At 12", it provides a practical elevation boost for clearing rails, windshield frames, and low arches without adding excessive leverage on the base.
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
Parts Desk Insights
Best Use Case: This extension is the right choice when your antenna base sits at deck level or on a cabin top and needs a modest height boost to clear a rail, windshield frame, or low arch. It's a popular fit on center consoles, walkarounds, and express cruisers where a short riser keeps the antenna accessible without adding excessive leverage on the mount. Also see the Sea-Dog 316 SS Antenna Mount Extension – 12" (SED-329532-1) if you need the individually packaged version. If 12" isn’t enough clearance, step up to 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. On taller or extended antenna runs, add a Sea-Dog Nylon Antenna Stand-Off Bracket to reduce flex at speed.
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 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.