Slotted round nuts, DIN 546: M2–M20 outside diameter, height, slot width and depth — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/slotted-round-nuts-din-546/  (sheet CC BY 4.0)
Basis: fasten.it DIN 546 table (09/2010: d1, m, n, t), cross-checked against Westfield Fasteners' DIN 546 table and spot checks of Aspen, Würth and Fabory listings
Catalog version: 2026-10-20

Sizes: see table below
- Columns: thread, outside diameter d1, height m, slot width n, slot depth t (min–max). The model uses the midpoint of t.
- M12 is omitted (sources disagree on t max); M1–M1.6 are not drawn. Thread drawn as a plain bore at the major diameter.

thread  d1  m  n  t min  t max
M2  4.5  2  1  0.8  1.0
M2.5  5.5  2.2  1.2  0.9  1.1
M3  6  2.5  1.2  1.0  1.2
M3.5  7  3  1.4  1.0  1.4
M4  8  3.5  1.4  1.2  1.6
M5  9  4.2  2  1.5  1.9
M6  11  5  2.5  2.0  2.4
M8  14  6.5  3  2.5  3.0
M10  18  8  3.5  3.2  3.7
M14  24  11  4  3.8  4.3
M16  26  12  4  3.8  4.3
M18  29  13  4  4.8  5.5
M20  32  14  5  4.8  5.5

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- fasten.it: DIN 546 slotted round nuts (09/2010): dk, m, n, t — web — Publisher's page; dimensions are facts — https://fasten.it/en/norms/norm/din_546
- Westfield Fasteners: DIN 546 slotted round nuts: dimensions and tolerances — web — Publisher's page; dimensions are facts — https://www.westfieldfasteners.co.uk/Standards/Nut-SlotRound546-M.html

Free files (CC BY 4.0, Xem Studio; STEP + STL, 13 parts): https://xemstudio.com/files/hardware/slotted-round-nuts-din-546/index.json
API: https://xemstudio.com/api/geometry?object=slotted-round-nuts-din-546