Seachoice 17921 Watertight Cable Thru-Hull Fitting | White | 1/4" Slot | 1-1/4" Flange
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You have 30 days to request a return. All sale items are final sale.
Seachoice 17921 Watertight Cable Thru-Hull Fitting
The Seachoice 17921 is a self-attaching, watertight thru-hull fitting designed to route electrical cables cleanly and safely through a boat hull or bulkhead without additional hardware. The 1/4" slot accommodates single or double cables, and the 1-1/4" flange provides a secure, finished seal against the hull surface. The white finish is the right choice for white gelcoat hulls and topsides, giving the installation a clean, factory-finished appearance. The watertight design keeps moisture out of the cable entry point for a reliable, long-term installation up to 2" hull thickness.
Key Features
- Watertight seal — keeps moisture out at the cable entry point
- Self-attaching design — no additional hardware required
- 1/4" slot accommodates single or double cables
- 1-1/4" flange for a secure, finished surface seal
- 2" maximum hull thickness
- White finish — blends with white gelcoat hulls and topsides
- Compact and lightweight
Compatible Applications
- Routing transducer cables, antenna cables, or power leads through the hull
- Bilge pump wiring and through-hull electrical runs
- Fish finder and depth sounder cable routing
- Any single or double cable requiring a watertight hull or bulkhead penetration up to 2" thick
- Powerboats, sailboats, and trailered vessels with white hulls or topsides
Parts Desk Insights
The 17921 is the white-finish version of the popular Seachoice cable thru-hull range — functionally identical to the Seachoice 17901 (Black, 1/4" Slot), so the choice comes down to hull colour. It's the fitting we recommend when a customer wants a clean, invisible cable entry on a white fibreglass hull. If you need a wider slot for heavier gauge wiring or dual cables with more clearance, the Seachoice 17991 (9/32" Slot, 1-1/2" Flange, White) is the next size up in white. Browse all variants in our Switches & Circuit Protection collection.
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.