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CURT 40003 trailer ball (2 in ball, 3/4 × 1-3/4 in shank, 3,500 lb)
What are the dimensions of the CURT 40003 trailer ball? · Modern device · basis: Manufacturer specifications (Lippert (CURT))
Also called: curt 40003, 2 inch trailer ball dimensions, 2 hitch ball 3/4 inch shank, 2 inch ball size mm, 2 ball coupler fit, trailer ball shank size, 2 inch hitch ball cover, hitch ball sizes chart, bola de remolque 2, Kugelkopf 2 Zoll, bola de engate medidas
Exact dimensions. True size, with no printing tolerance added.
- length
- 50.8 mm
- width
- 50.8 mm
Notes
- CURT part 40003 is a 2 in trailer ball on a 3/4 in diameter × 1-3/4 in long shank, rated 3,500 lb GTW.
- Ball and shank sizes are from the product title; rise, flat size and thread are not published.
- Ball-mount hole must match the shank diameter; shank length must cover the mount thickness plus washer and nut.
- True size, no printing tolerance added. Only published numbers are used; anything not published is said so.
CURT 40003 trailer ball size chart
| dimension | value |
|---|---|
| Ball diameter | 2 in (50.8 mm) |
| Shank diameter | 3/4 in (19.05 mm) |
| Shank length | 1 3/4 in (44.45 mm) |
| Gross trailer weight rating | 3,500 lb |
| Finish | Chrome |
| Part number | 40003 |
Where the files are
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
| Lippert (CURT) | CURT 2" Trailer Ball (3/4" x 1-3/4" Shank, 3,500 lbs.) #40003 | web | Publisher's page; dimensions are facts |
Free files
★ Free files 2 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json
| curt-trailer-ball-40003-ball | Ball Ø50.8 mm | STEP · STL |
| curt-trailer-ball-40003-shank | Shank Ø19.05 × 44.45 mm (collar, rise and thread not published, not modelled) | STEP · STL |
https://xemstudio.com/mcp to Claude, ChatGPT, Cursor or any MCP client (free, no account, one minute) and it can look up exact sizes, mating fits and free STEP/STL from every chat.Plain text: sheet.txt · JSON: /api/geometry?object=curt-trailer-ball-40003

Fits with




Questions
What size is CURT trailer ball 40003?
2 in ball (50.8 mm), 3/4 in × 1-3/4 in shank (19.05 mm × 44.45 mm), 3,500 lb.