Sea-Dog Two-Piece Trailer Coupler Lock (354-7510301)
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
Sea-Dog Two-Piece Trailer Coupler Lock
Add a reliable layer of security to your trailer with this two-piece coupler lock from Sea-Dog. Designed to deter theft and prevent accidental uncoupling while in transit, it fits over the coupler ball socket and locks in place with a keyed cylinder. The split two-piece design makes installation and removal easy even in tight, hard-to-reach hitch areas — no need to maneuver a single-piece lock around awkward angles. Corrosion-resistant construction keeps it working season after season in wet and marine environments.
Key Features
- Two-piece design for easy installation in tight or hard-to-reach coupler locations
- Fits most standard coupler sizes
- Brass-plated zinc construction for corrosion resistance
- Includes 2 matching keys
- Deters theft and prevents accidental uncoupling while trailering
Compatible Applications
- Most standard ball couplers on boat trailers, utility trailers, and recreational trailers
- Use alongside the Galvanized Coupler Locking Pin (354-7510101) or Galvanized Coupler Locking Pin (354-7510111) for added security
- Pairs with the Seachoice Solid Brass Coupler Lock as an alternative solid-brass option
- Compatible with the Seachoice 2" Ball Trailer Coupler and most equivalent couplers
Parts Desk Insights
Best used as an everyday coupler lock for trailers stored at a marina, public lot, or anywhere the trailer is left unattended. The two-piece design is the standout feature here — it’s noticeably easier to install than a traditional single-piece lock when your coupler is mounted low or close to the tow vehicle. If you need a heavier-duty or solid-brass option, consider the Seachoice Solid Brass Coupler Lock or the Coupler Security Lock. For a belt-and-suspenders approach, combine this lock with a Coupler Locking Pin for dual-point security.
SKU: 354-7510301 | Barcode: 035514751063
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.