Sea-Dog Galvanized Coupler Locking Pin – Square, Spring Snap (354-7510101)
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You have 30 days to request a return. All sale items are final sale.
Sea-Dog Galvanized Coupler Locking Pin – Square, Spring Snap
A reliable, no-fuss safety pin for keeping your trailer coupler locked onto the hitch ball while in transit. This square coupler locking pin from Sea-Dog threads through the coupler latch and snaps securely in place with a spring-tensioned bale — holding more firmly than a standard cotter pin or clip, even on rough roads and long highway runs. Electro-galvanized steel construction resists corrosion in wet and marine environments, making it a dependable everyday part for boat trailer use.
Key Features
- Square pin design fits most standard coupler sizes
- Spring-tensioned snap lock bale for stronger, more secure holding power
- Electro-galvanized steel construction for corrosion resistance
- Prevents accidental uncoupling while trailering
- Lightweight and easy to install — no tools required
Compatible Applications
- Most standard ball couplers on boat trailers, utility trailers, and recreational trailers
- Compare with the Sea-Dog Galvanized Coupler Locking Pin (354-7510111) — check both SKUs to confirm the correct fit for your coupler pin hole
- Pair with the Sea-Dog Two-Piece Coupler Lock (354-7510301) for dual-point theft deterrence and uncoupling protection
- Compatible with the Seachoice 2" Ball Trailer Coupler and most equivalent couplers
Parts Desk Insights
Best used as a permanent, always-on safety pin for everyday trailering — the type of part that stays on the coupler full-time and gets swapped out when lost or corroded. The spring snap bale is a meaningful upgrade over a plain cotter pin: it won’t vibrate loose on rough roads and is faster to operate at the ramp. This pin is a safety-against-accidental-uncoupling part, not a theft deterrent — for theft prevention, add the Sea-Dog Two-Piece Coupler Lock or the Seachoice Solid Brass Coupler Lock. If you’re unsure whether this SKU or the 354-7510111 fits your coupler, compare the pin dimensions against your existing hardware before ordering.
SKU: 354-7510101 | Barcode: 035514751025
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.