CURT 2 in. Trailer Hitch Ball — 2" Chrome, 1" Fine-Thread Shank, 7,500 lb Capacity

CURT 40037 is a 2-inch chrome trailer hitch ball built from hot-forged steel and rated to tow up to 7,500 pounds with a fine-thread 1" shank for secure installation.

This precision-manufactured trailer ball from CURT is made to match standard 2" couplers and give reliable hitch performance for trucks and SUVs. Finished in nickel-chrome to resist corrosion and paired with a zinc nut and helical lock washer, the 40037 balances durable construction with a clean, serviceable surface. Each unit is tested to U.S. VESC specifications so you can expect consistent manufacturing quality and fit when swapping balls between ball mounts and hitches.

How does the CURT 2" ball fit common trailer setups?

The 40037 is sized to work with virtually any coupler that accepts a 2" ball, making it compatible with many utility, boat, camper, and recreational trailers. The 1" diameter shank and 2-1/8" length match most ball-mount holes for a secure, centered connection.

• 2" ball diameter for standard 2" couplers
• 1" shank diameter and 2-1/8" length for common ball mounts
• Fine-thread shank for better clamping and torque retention

What towing loads and vehicle classes is it suitable for?

Rated for a 7,500 lb gross trailer weight, this CURT ball covers the needs of many mid- to heavy-duty towing tasks when matched with appropriately rated hitches, vehicles, and trailers. Always respect the lowest-rated component in your towing system — vehicle, hitch, or trailer — as your working limit.

• 7,500 lb gross trailer weight capacity
• Ideal for pickup trucks and SUVs using Class 3 or Class 4 hitches
• Suitable for utility, boat, camper, ATV, and similar trailers

What protects the ball from rust and wear during regular use?

The CURT 40037 has a nickel-chrome plating that resists corrosion, road grime, and scratching better than bare steel. Combined with proper installation torque and the included hardware, the finish helps maintain a smooth coupling surface and reduces maintenance over time.

• Nickel-chrome finish for oxidation and scratch resistance
• Zinc-plated hex nut and helical lock washer included for secure fastening
• Fine threads reduce loosening and help maintain clamp tension

How easy is it to install and secure this hitch ball?

Installation is straightforward: insert the shank through the ball-mount hole, fit the helical lock washer and zinc nut, then torque to specification. The fine-threaded shank increases holding strength, and the straight shank length accommodates a wide range of mounts without needing modifications.

• Fine-thread shank requires recommended torque (250 lb-ft) for best retention
• Shank length (2-1/8") suits most mounts without extensions
• Includes lock washer and hex nut for dependable clamping force

Who this is for: The CURT 40037 fits drivers who need a dependable, corrosion-resistant 2" hitch ball for regular towing with pickup trucks or SUVs. It's aimed at owners of utility trailers, boats, campers, and recreational trailers who want a tested, precision-fit ball that pairs with Class 3 and Class 4 hitches. If you require higher or lower weight ratings, choose a ball matched to the lowest-rated towing component in your system.