CURT Trailer Hitch Ball 2-5/16" Chrome, 10,000 lb Rating, 1" x 2-1/4" Shank, Nickel-Chrome Finish

CURT 40007 is a heavy-duty 2-5/16-inch chrome trailer hitch ball built to tow up to 10,000 pounds with a 1" shank and 2-1/4" thread engagement.

Built for demanding towing jobs, the CURT 40007 hitch ball combines hot-forged steel strength, corrosion-resistant plating, and precision machining so your coupler seats securely and resists wear. It’s engineered to meet rigorous U.S. VESC testing standards and includes the hardware needed for a dependable install. Use it only within the limits of your vehicle, hitch, and trailer components.

How does this hitch ball handle heavy towing tasks?

The 40007 is forged from high-strength steel and rated for a 10,000 lb gross trailer weight, providing the structural capacity required for many Class 5 towing setups. Its construction minimizes deformation under load and the design reduces stress concentrations at the ball-shank junction.

• 10,000 lb gross trailer weight rating for heavy-duty towing
• Hot-forged steel core for improved impact and shear resistance
• Meets U.S. VESC testing benchmarks for safety and durability

Will this ball fit my 2-5/16" coupler and hitch mount?

The ball diameter is a true 2-5/16 inches to match standard 2-5/16" couplers, while the shank is sized at 1" diameter and 2-1/4" length for secure installation into most Class 5 ball mounts. Fine threads and supplied hardware help maintain clamping force when torqued to specification.

• 2-5/16" ball diameter for compatible couplers
• 1" shank diameter and 2-1/4" shank length for stable engagement
• Comes with zinc-plated hex nut and helical lock washer for secure fastening

How does the finish protect the hitch ball from the elements?

The CURT 40007 uses a nickel-chrome plating that resists corrosion and surface wear better than bare steel. The smooth finish also reduces abrasion against couplers and helps prevent rust from compromising fit or appearance over time.

• Nickel-chrome plating for enhanced corrosion resistance
• Smooth surface reduces wear on couplers and contact points
• Chrome finish simplifies cleaning and inspection

What installation and maintenance steps should I follow?

Install the ball into the mount, hand-start the nut and washer, then torque to the manufacturer recommended 250 lb-ft to ensure safe clamping. Periodically inspect threads, plating, and the nut/washer assembly for corrosion or loosening, and re-torque after initial road use.

• Use the supplied hex nut and helical lock washer for a secure fit
• Torque to 250 lb-ft (per product guidance) and recheck after first use
• Regularly inspect finish and mounting hardware for wear or rust

Who is this for: The CURT 40007 is aimed at drivers who tow heavy loads with Class 5 hitches—owners of large utility trailers, toy haulers, dump trailers, full-size RVs, and small boat trailers who need a rugged, proven 2-5/16" hitch ball. It’s also a good choice for fleet managers and contractors who require dependable components that meet U.S. VESC standards. Always verify that the lowest-rated component in your towing setup dictates your maximum safe tow weight.