Sea-Dog Nylon Antenna Thread Adapter – 3/8"-24 to 1" Base | SED-329550-1
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Sea-Dog Nylon Antenna Thread Adapter – 3/8"-24 to 1" Base
Bridge the thread gap between a 3/8"-24 antenna whip and a standard 1" antenna base with this nylon adapter from Sea-Dog. A straightforward solution when your antenna and base don't share the same thread standard — allowing you to use a finer-thread whip on a coarser 1" base without modification or compromise.
Nylon construction keeps weight minimal and eliminates any galvanic corrosion risk between the antenna and base, making it a clean, long-lasting fit for saltwater installations.
Key Features
- Adapts 3/8"-24 thread antenna whip to a standard 1" antenna base
- Nylon construction – lightweight and corrosion-free
- No tools required for most installations
- Eliminates galvanic corrosion between dissimilar metals
- MPN: 329550-1
Parts Desk Insights
Best Use Case: This adapter is the right call when you're replacing or upgrading an antenna whip and the new whip uses a 3/8"-24 thread but your existing base is a standard 1" mount — a common mismatch when mixing antenna brands or generations. It's also useful when repurposing a Loran-era whip on a modern VHF or GPS base. If you're also replacing the base itself, consider a Sea-Dog Stainless Steel Deck Mount Antenna Base or the Sea-Dog Heavy Duty Stainless Steel Deck Mount Antenna Mount for a complete, corrosion-proof setup. For securing the antenna shaft once mounted, see the Sea-Dog Antenna Clip – 5/16" to 1/2" or the Sea-Dog Nylon Antenna Stand-Off Bracket.
Thread Note: Confirm both your antenna whip thread (3/8"-24) and your base thread (1") before ordering. Thread adapters are not universal — an incorrect fit can damage the antenna or base threads.
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.