Seachoice 19831 UG-175 Coaxial Reducer Adapter | Chrome Brass | For RG-58U & PL-259
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Seachoice 19831 UG-175 Coaxial Reducer Adapter
The Seachoice 19831 is a UG-175 reducer adapter designed to be used with a PL-259 connector shell when terminating RG-58U coaxial cable. The UG-175 slides over the smaller-diameter RG-58U cable and threads into the back of a standard PL-259 shell, allowing the connector to fit the cable correctly and make a solid, reliable connection. Chrome-plated brass construction resists corrosion in the marine environment and provides a secure, long-lasting fit. Typically used alongside the Seachoice 19821 PL-259 VHF Connector (sold separately).
Key Features
- UG-175 reducer adapter — allows PL-259 connectors to fit RG-58U coaxial cable
- Chrome-plated brass construction for corrosion resistance and durability
- Threads into the back of a standard PL-259 connector shell
- Compact and lightweight
- Sold individually
Compatible Applications
- Terminating RG-58U coaxial cable with a standard PL-259 connector
- VHF marine radio antenna cable installations and repairs
- Any application requiring a UG-175 reducer to adapt RG-58U cable to a PL-259 shell
- Use with the Seachoice 19821 PL-259 VHF Connector for a complete termination
Parts Desk Insights
The UG-175 is the adapter customers often forget to order when they buy a PL-259 connector for RG-58U cable — without it, the connector shell won’t fit the smaller cable diameter correctly. It’s a small part that makes the difference between a solid termination and a loose, unreliable connection. Always recommend it alongside the Seachoice 19821 PL-259 Connector when a customer is terminating RG-58U cable. If the customer is running RG-8/X cable instead, they’ll need a different adapter — the Shakespeare PL-259CPG Gold-Plated Connector for RG-58 A/U & RG-8/X is a solderless option that includes the correct adapter for that cable type. For a complete pre-terminated cable solution, the Shakespeare 35 ft Marine Antenna Cable Kit is worth considering.
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.