CURT 40089 is a 3-inch-diameter, 30,000-lb-capacity heavy-duty threaded trailer ball for a compatible 3-inch trailer coupler, including properly engineered gooseneck or custom towing setups. It is a forged, heat-treated raw-steel ball with a 2-inch-diameter, 3-1/4-inch-long threaded shank—not a weld-on ball or a drop-in OEM gooseneck replacement. CURT supplies a zinc-plated hex nut and helical lock washer. The mounting platform must be at least 3/8 inch thick and the mounting hole must not exceed the threaded-shank diameter by more than 1/16 inch. Follow CURT's specified mounting torque and the requirements of the complete hitch and vehicle; never exceed the lowest-rated component.
- 3-inch ball for matching trailer couplers, rated to 30,000 lb GTW.
- 2-inch threaded shank, 3-1/4-inch shank length; installation hardware included.
- Raw forged steel, heat-treated for heavy-duty towing; no finished hitch assembly included.
Key Features
- Designed for Flat-Bed Gooseneck Hitches With Minimum 3/8 in Thickness.
- Gross Trailer Weight: 30000 lb.
- Diameter: 3 in.
- Color: Silver.
- Material: Steel.
Specifications
| Gross Trailer Weight |
30000 lb |
| Finish |
Bare |
| Color |
Silver |
| Material |
Steel |
| Diameter |
3 in |
Fitment & Compatibility
| Compatibility |
3-inch trailer couplers with a suitably rated hitch or gooseneck mounting platform at least 3/8 in thick; 2-inch threaded shank |
Part Identification
| Brand |
CURT |
| Manufacturer Part Number |
40089 |
