CURT Trailer Coupler Straight Tongue for 3-Inch Channel — 2-inch Ball, 5,000 lb GTW, Posi-Lock Zinc

CURT 25100 is a straight-tongue trailer coupler built for a 3-inch channel that securely mates to a standard 2-inch trailer ball and is rated for 5,000 lb gross trailer weight.

When you need a reliable replacement coupler or a solid new install for a trailer project, the CURT 25100 combines heavy-gauge steel construction, adjustable Posi-Lock latch action and zinc plating to resist corrosion and wear. Designed to mount to a 3-inch trailer tongue channel, this coupler gives a straightforward, serviceable connection for utility trailers, small equipment haulers and many boat trailers. It balances a simple fit-up with features that help keep your hitch tight and secure on the road.

How does this coupler attach to a 3-inch trailer channel?

The CURT 25100 slips over a straight 3-inch-wide tongue channel and secures with fasteners through the pre-punched mounting area. Its design aligns to the channel for a stable, low-profile installation that avoids complex fabrication.

• Mounts to a 3-inch-wide trailer tongue channel.
• Pre-punched holes for bolting or riveting to the tongue beam.
• Low-profile fit keeps the trailer tongue compact and tidy.

What makes the Posi-Lock latch easy to use and adjust?

The Posi-Lock system uses a spring-loaded latch and an internal adjustable nut to set the coupling tension against the trailer ball. You can loosen or tighten the nut to eliminate play and ensure a snug engagement without special tools.

• Spring-assisted Posi-Lock latch for positive engagement.
• Adjustable internal nut lets you fine-tune fit to the 2" ball.
• Latch accepts a safety pin or coupler lock for extra security.

What load ratings and durability can I expect from the CURT 25100?

This coupler is manufactured from die-cut and punched steel and finished with zinc plating to withstand road conditions and moisture. It is rated as a Class 3 coupler with a 5,000 lb gross trailer weight capacity and 700 lb tongue weight capacity.

• 5,000 lb gross trailer weight rating (GTW).
• 700 lb maximum tongue weight (TW).
• Durable zinc finish for corrosion resistance in wet and salty environments.

How does this coupler improve towing security and maintenance?

The lockable Posi-Lock latch reduces the chance of accidental uncoupling and accepts commonly available coupler locks or safety pins, while the adjustable tension feature minimizes wear from slop. Routine inspection and occasional lubrication of the latch keep it performing well over time.

• Lockable latch for theft deterrence and safety.
• Adjustability reduces wear and prevents excessive play.
• Zinc plating lowers long-term corrosion and maintenance frequency.

Who is this for: The CURT 25100 is aimed at trailer owners, DIY builders and fleet operators who need a dependable, easy-to-install straight-tongue coupler for 3" channel tongues that mates to standard 2" balls. It suits utility trailers, small equipment haulers, personal boat trailers and anyone replacing a worn coupler with a serviceable, adjustable unit backed by CURT's limited lifetime warranty.