Sea-Dog 316 Stainless Steel Antenna Mount Extension – 24" | SED-329536-1
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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 – 24"
Raise your VHF, AIS, or GPS antenna to a better vantage point with this heavy-duty 24" antenna mount extension from Sea-Dog. Investment cast from 316 stainless steel — the marine grade — it delivers the corrosion resistance and structural rigidity needed for permanent offshore and coastal installations where lesser materials fail over time.
The standard 1"-14 thread fits the vast majority of marine antenna bases and antennas, making it a direct drop-in extension for most existing setups. At 24" of additional height, it's the right choice when you need meaningful elevation gain — clearing obstructions, improving line-of-sight range, or getting above a hardtop or arch.
Key Features
- Investment cast 316 stainless steel – maximum marine corrosion resistance
- Standard 1"-14 thread – compatible with most marine antenna bases and antennas
- 24" length for significant elevation gain
- 1-1/16" outer diameter, 13/16" tube wall
- Suitable for permanent offshore and coastal installations
- MPN: 329536-1
Parts Desk Insights
Best Use Case: This extension is the right call when your antenna is mounted low — on a deck base or cabin top — and you need to clear a hardtop, T-top, or arch to improve VHF range or GPS sky view. The 24" length is best suited to situations where a 12" extension won't clear the obstruction. If 24" is more than you need, see the Sea-Dog Stainless Steel 12" Antenna Mount Extension or the Sea-Dog Stainless Steel 12" Antenna Mount Extension for a shorter reach. For the base itself, 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 extensions like this, a Sea-Dog Nylon Antenna Stand-Off Bracket is strongly recommended to reduce flex and vibration 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.