CURT A-Frame Trailer Coupler 2" Ball, 5,000 lb GTW, Posi-Lock Adjustable Black

The CURT 25210 A-frame coupler is a heavy-duty, adjustable coupler for A-frame trailer tongues that fits a 2" trailer ball and is rated for 5,000 lbs gross trailer weight and 700 lbs tongue weight.

Whether you're replacing a damaged coupler or finishing a trailer build, the right coupler ensures a secure connection between tow vehicle and trailer. The CURT 25210 is engineered for A-frame tongues, offering a Posi-Lock latch for easy adjustment and a lockable mechanism for added security. Made from punched, die-cut steel and finished in a durable black coating, this coupler is designed to resist corrosion and hold up under regular towing conditions.

How does the Posi-Lock latch make coupling simpler?

The Posi-Lock system uses a spring-loaded latch and an internal adjustable nut to create a snug, consistent fit on the trailer ball. It reduces play and allows quick on-the-road adjustments so the coupling stays tight without repeated retorquing.

• Spring-loaded latch for positive engagement and easy operation
• Adjustable internal nut to remove slack and set a firm fit
• Accepts a safety pin or coupler lock to prevent accidental uncoupling

What towing capacities and ball size does this coupler support?

This CURT A-frame coupler is rated as a Class 3 coupler with a 5,000 lb gross trailer weight capacity and a 700 lb tongue weight rating. It is engineered specifically to mate with a standard 2" diameter trailer ball, making it compatible with a wide range of light- to medium-duty trailers.

• 5,000 lbs gross trailer weight (GTW) capacity for typical utility and boat trailers
• 700 lbs tongue weight capacity for balanced towing loads
• Designed to fit a standard 2" trailer ball for broad compatibility

How durable is the construction and finish for long-term use?

Constructed from punched, die-cut steel, the 25210 coupler prioritizes strength where it matters most. A gloss black powder-coat finish protects against rust, road grime and exposure to the elements so the coupler maintains function and appearance season after season.

• Heavy-gauge steel body for structural strength under load
• Black powder-coat finish for corrosion and wear resistance
• Robust latch components designed for frequent use and road vibration

What security and warranty support come with this coupler?

The Posi-Lock latch accepts a safety pin or a coupler lock so you can secure the trailer when parked or during transport. CURT backs this coupler with a limited lifetime warranty, offering long-term peace of mind for owners.

• Lockable latch accepts common coupler locks and safety pins
• Limited lifetime warranty from CURT for covered defects
• Designed and manufactured to CURT quality and testing standards

Who is this for? The CURT 25210 A-frame coupler is made for owners and builders of A-frame trailers who need a dependable, adjustable coupling solution. It’s well suited to small utility trailers, boat trailers and many RV-style tongues where a 2" ball and up to 5,000 lbs GTW are required. If you want a simple-to-adjust, secure coupler with durable steel construction and a lockable Posi-Lock latch, this model is a practical choice.