40 mm axial fan — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/40mm-fan/  (CC BY 4.0)
Basis: industry standard frame
Catalog version: 2026-10-20

Overall (mm): length 40, width 40, height 10
Mounting holes: 4 × Ø3.5 mm, pattern 32 x 32, screw M3
- Frame 40 × 40 mm; four holes on a 32 × 32 mm pattern, Ø3.5 mm typical (M3 self-tapping or Ø4.3 for M4 on some).
- Thickness 10 mm (4010) or 20 mm (4020); check airflow direction arrows on the frame.

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- Wikipedia: Computer fan (dimensions table) — web — CC BY-SA 4.0 (text) — https://en.wikipedia.org/wiki/Computer_fan

Xem Studio scan: not needed; this is a published standard. The sheet is the geometry.
API: https://xemstudio.com/api/geometry?object=40mm-fan