Structural parts and accessories for trailers, namely, axles, wheel bearing kits that include wheel bearing protectors, suspension mounting bolts, brakes, connectors for braking systems, fenders, hitch balls, hitch ball mounts, anti-theft locks for use on trailer hitch couplers, lug nuts for wheels, trailer hitch receivers, trailer safety chains, spare tire carriers, standard and adjustable trailer hitch couplers, surge actuator couplers that automatically synchronize trailer brakes with the tow vehicle brakes, tires, tires mounted on wheels, trailer roof vent covers, weight distribution hitches, wheels, trailer suspension spring seats, boards and brackets specially adapted for centering boats on a boat trailer, and suspension U-bolts; structural parts and accessories for trailers, namely, brackets specially adapted for mounting trailer bunks, trailer bow rollers, and fenders; accessories for trailers, namely, D-rings, cables, and tie-downs specially adapted for securing cargo to trailers; suspension parts for trailers, namely, leaf springs and suspension mounts in the nature of metal hardware that stabilizes the suspension springs; structural parts of trailer towing equipment, namely, pintle hooks in the nature of hooks used to pull or attach a trailer; parts of trailer chassis, namely, cross members