Sea-Dog Galvanized Coupler Lock Pin - 5/16"

The Sea-Dog Galvanized Coupler Lock Pin - 5/16" is an essential safety component for boat trailers, jet ski hitches, and any marine coupling application where secure connection matters. Anyone who's spent time on the water knows that a loose coupler can mean disaster—loss of cargo, damaged equipment, or worse.

This galvanized pin keeps your trailer hitched securely to your tow vehicle, eliminating that nagging worry about separation on the road or launch ramp. Manufactured by Sea-Dog, a trusted name in marine hardware for decades, this lock pin features hot-dip galvanized steel construction that resists rust and corrosion in saltwater and freshwater environments alike.

The 5/16" diameter shaft fits standard ball couplers and A-frame hitch assemblies, while the integrated pin head and locking mechanism provide positive engagement that won't rattle loose over rough terrain or extended highway travel. Regularly inspect your coupler hardware before trips; a worn or missing pin is one of the easiest trailer failures to prevent.