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Trailer hitch receiver, 3 in square (SAE J684 classes)
What are the dimensions of the Trailer hitch receiver, 3 in square? · Modern device · basis: Manufacturer specifications (Lippert (CURT))
Also called: 3 inch hitch receiver, 3 receiver dimensions, 3 hitch pin size, 3 receiver insert, 3 hitch cover 3d print, 3 hitch receiver size mm, hitch class chart, sae j684 receiver, hitch receiver sizes, receptor enganche 3 pulgadas, Anhängerkupplung Aufnahme 3 Zoll
Exact dimensions. True size, with no printing tolerance added.
- length
- 76.2 mm
- width
- 76.2 mm
Notes
- A 3 in receiver takes a 3 in square shank and a 5/8 in hitch pin, per CURT/Lippert's class and pin guides.
- Rated weights depend on the specific hitch; the class figures are the maker's typical ranges.
- No CAD file: the maker publishes only overall sizes, and a plain box or cylinder is not useful design geometry. The table is the published data; parts with real geometry have their own pages.
Trailer hitch receiver, 3 in square size chart
| dimension | value |
|---|---|
| Receiver size | 3 × 3 in (76.2 mm square) |
| Hitch classes | Class 5+ (3 in) |
| Hitch pin diameter | 5/8 in (15.88 mm) |
| Minimum usable pin length (excl. handle) | 4-7/8 in (123.82 mm) |
Where the files are
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
| Lippert (CURT) | A Beginner's Guide to Hitch Classes | web | Publisher's page; dimensions are facts |
| Lippert (CURT) | Guide to Hitch Pin Sizes | web | Publisher's page; dimensions are facts |
Xem scan
File coming
No downloadable true-size file yet: the published figures do not fix the whole shape, and Xem never guesses a number. A measured scan is planned; request it and it moves up.
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=trailer-hitch-receiver-3-inch
Questions
What pin fits a 3 in receiver?
A 5/8 in (15.88 mm) pin with at least 4-7/8 in usable length.