This CURT trailer ball fits standard 2-5/16" couplers and is rated for up to 6,000 lbs gross trailer weight. It is hot-forged from high-strength steel and chrome-plated to resist corrosion and wear, with a 1" diameter shank 3" long and fine threads for added holding strength. A zinc-plated hex nut and helical lock washer are included. CURT part #40075.

• Fits 2-5/16" couplers; 6,000 lb gross trailer weight (GTW) capacity
• Shank: 1" diameter x 3" long, 0" rise
• Hot-forged high-strength steel with a chrome-plated finish
• Zinc-plated hex nut and helical lock washer included
• Fine threads for superior holding strength
• Torque the mounting nut to 250 ft-lb
• Tested for safety to meet U.S. VESC V-5 specifications
• Limited lifetime warranty (one-year finish, one-year parts)

Before you buy: The mounting platform must be at least 3/8" thick, and the hole must be no more than 1/16" larger in diameter than the threaded shank. Match the ball to your coupler size, and never exceed the lowest weight rating of any part of the towing system - vehicle, hitch, ball mount, trailer ball or trailer.