CURT 40056 trailer ball (2 in ball, 1-1/4 × 2-5/8 in shank, 10,000 lb) — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/curt-trailer-ball-40056/  (sheet CC BY 4.0)
Basis: Manufacturer specifications (Lippert (CURT))
Catalog version: 2026-10-20

Overall (mm): length 50.8, width 50.8
- CURT part 40056 is a 2 in trailer ball on a 1-1/4 in diameter × 2-5/8 in long shank, rated 10,000 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.

dimension  value
Ball diameter  2 in (50.8 mm)
Shank diameter  1 1/4 in (31.75 mm)
Shank length  2 5/8 in (66.67 mm)
Gross trailer weight rating  10,000 lb
Finish  Stainless
Part number  40056

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- Lippert (CURT): CURT 2" Trailer Ball (1-1/4" x 2-5/8" Shank, 10,000 lbs.) #40056 — web — Publisher's page; dimensions are facts — https://www.lippert.com/curt-2in-trailer-ball-125in-x-2625in-shank-10000-lbs-stainless-40056-2021017392

Free files (CC BY 4.0, Xem Studio; STEP + STL, 2 parts): https://xemstudio.com/files/hardware/curt-trailer-ball-40056/index.json
API: https://xemstudio.com/api/geometry?object=curt-trailer-ball-40056