Sea-Dog Galvanized Coupler Locking Pin – Square, Spring Snap (354-7510111)
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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 simple, affordable safeguard against accidental trailer uncoupling. This square coupler locking pin from Sea-Dog threads through the coupler latch to keep the ball socket locked onto the hitch ball while in transit. The spring-tensioned snap lock bale holds the pin firmly in place, resisting vibration and road shock that can work a standard pin loose over time. Electro-galvanized steel construction stands up to wet and marine environments without rusting out.
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
- Use alongside the Sea-Dog Galvanized Coupler Locking Pin (354-7510101) — compare both to confirm the correct pin style for your coupler
- 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 low-cost, always-on safety pin for everyday trailering — the kind of part that lives on the coupler full-time and gets replaced when it’s lost or corroded. The spring snap bale is the key feature here: it holds more reliably than a plain cotter pin or clip, especially on rough roads or long highway hauls. This is a security-against-accidental-uncoupling part, not a theft deterrent — if theft prevention is the goal, add the Sea-Dog Two-Piece Coupler Lock or the Seachoice Solid Brass Coupler Lock. Check your coupler’s pin hole shape before ordering — compare with the 354-7510101 variant if unsure which fits.
SKU: 354-7510111 | Barcode: 035514751094
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.