CURT A-Frame Trailer Coupler 2" Ball — Class 3 5,000 lb GTW, Lockable Posi-Lock

The CURT 25210 A-Frame Coupler is a heavy-duty, lockable Class 3 trailer coupler built for A-frame tongues that fits a 2" trailer ball and is rated 5,000 lb gross trailer weight with 700 lb tongue weight.

This CURT coupler is designed as a dependable replacement or new-install component for trailers with A-shaped tongues, commonly found on utility trailers, boat trailers and RV tow setups. It combines stamped steel construction with a corrosion-resistant black finish and a Posi-Lock latch system so you get a snug, secure connection that is easy to adjust and offers an option to lock the latch for added security.

How does the Posi-Lock latch make coupling and adjustment easier?

The Posi-Lock latch uses a spring-assisted engagement and an internal adjustable nut to dial in a tight fit around the trailer ball. That simple adjustment avoids slop or over-tightening and keeps the ball firmly seated without repeated readjustment on the road.

• Spring-assisted Posi-Lock latch for positive engagement
• Interior adjustable nut/bolt lets you fine-tune fit
• Accepts a safety pin or coupler lock to prevent uncoupling

Is this coupler strong enough for my trailer's weight?

CURT rates the 25210 as a Class 3 A-frame coupler with a 5,000 lb gross trailer weight (GTW) capacity and 700 lb tongue weight (TW). It’s engineered from punched, die-cut steel to handle typical loads for midsize trailers, boats and cargo while meeting common towing setups that use a 2" ball.

• 5,000 lb gross trailer weight capacity
• 700 lb tongue weight capacity
• Designed for 2" diameter trailer balls (standard size)

Will the finish and construction resist rust and road wear?

The coupler is constructed from robust steel components and finished with a durable black powder coat to resist corrosion from rain, salt, dirt and regular road grime. The coating extends service life, especially on boat trailers or vehicles exposed to harsh conditions.

• Punched, die-cut steel body for strength and consistency
• Gloss black/powder-coated finish for corrosion resistance
• Suitable for frequent outdoor exposure and marine environments

What security and warranty features does CURT include?

The latch is lockable and accepts a safety pin or aftermarket coupler lock so you can secure your trailer when parked. CURT backs this coupler with a limited lifetime warranty, giving buyers additional confidence in its long-term performance.

• Lockable Posi-Lock latch accepts coupler locks or safety pins
• Limited lifetime warranty from CURT
• Simple hardware design for easy service and replacement

Who this product is for: The CURT 25210 A-Frame Coupler is aimed at trailer owners and builders who need a reliable, adjustable Class 3 coupler for A-frame tongues. It suits DIY trailer repairs, new trailer builds, boat trailer retrofits and RV or utility trailers using a 2" ball where a 5,000 lb GTW and 700 lb TW rating is appropriate. Choose this coupler if you want a sturdy steel assembly, an easily adjusted Posi-Lock latch, corrosion resistance for outdoor use, and the option to secure the latch with a lock for theft prevention.