CURT Trailer Hitch Ball 1-7/8-Inch Chrome — 3,500 lb Capacity, Fine-Thread Shank

If you tow small utility trailers, boats, campers or other light loads, the right trailer ball ensures a safe, reliable connection between your vehicle and trailer. The CURT 40002 is engineered to meet U.S. VESC standards and offers a precision 1-7/8" diameter to match standard couplers while delivering corrosion resistance and dependable hardware for installation.

How does this hitch ball match my trailer coupler?

The CURT 40002 uses a true 1-7/8" ball diameter that mates precisely with 1-7/8" couplers to minimize movement and wear. Accurate sizing reduces play at the hitch and improves towing stability.

• Exact 1-7/8" ball diameter stamped and manufactured to fit 1-7/8" couplers
• Fine-thread shank (1" diameter, 2-1/8" length) for a tight, reliable clamp
• Zero rise profile for maintaining trailer height geometry

What towing capacity and trailer types can it handle?

This hitch ball carries a 3,500 lb gross trailer weight rating suitable for many light towing tasks. It’s intended for small boats, utility trailers, pop-up campers and other similarly sized trailers — always limited by the lowest-rated towing component in your setup.

• 3,500 lb maximum gross trailer weight rating
• Ideal for small boat trailers, utility trailers, lightweight campers
• Do not exceed the vehicle, hitch, ball mount or trailer’s lowest rating

What materials and finishes protect it from wear and corrosion?

The ball is hot-forged from high-strength steel to withstand towing loads and then plated with nickel-chrome for long-lasting surface protection. The plating resists rust, abrasion and road grime to keep the ball functional through repeated use.

• Hot-forged steel core for structural strength
• Nickel-chrome plated finish that resists corrosion and surface wear
• Zinc-plated hex nut and helical lock washer included for secure fastening

How is the CURT 40002 secured to the ball mount?

The 1" diameter shank and 2-1/8" length thread through the ball mount and fasten with the supplied hex nut and helical lock washer. Fine threads improve clamping and the nut is torqued to specification to retain the ball under load.

• 1" shank diameter with 2-1/8" thread engagement for secure mounting
• Fine threads for increased holding strength (recommended torque: 250 lb-ft)
• Includes zinc-plated hex nut and helical lock washer for vibration resistance

Who this is for: The CURT 40002 is aimed at drivers who tow light loads and need a precise, durable hitch ball that matches standard 1-7/8" couplers. It’s a practical choice for owners of compact trucks, SUVs and cars using class 1 or class 2 hitches who value accurate fitment, corrosion resistance and tested safety standards. Always verify that the ball’s 3,500 lb rating does not exceed any other component in your towing system before use.