Hexagon nuts with collar, 1.5 d high, DIN 6331: M6–M36 across flats, collar diameter, height — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/hex-nuts-collar-din-6331/  (sheet CC BY 4.0)
Basis: fasteners.eu DIN 6331 table (a, d1, e, m, s), cross-checked against Ganter's and AMF's DIN 6331 tables
Catalog version: 2026-10-20

Sizes: see table below
- Columns: thread, width across flats s, total height m (1.5 d), collar diameter d1, collar height a. Ganter and AMF give the same values (e.g. M12: SW18, m 18, collar Ø25 × 4).
- M14 is omitted (sources disagree on the collar height); M10 and M12 are also sold as SW17 / SW19 variants. Thread drawn as a plain bore at the major diameter.

thread  s  m  d1  a
M6  10  9  14  3
M8  13  12  18  3.5
M10  16  15  22  4
M12  18  18  25  4
M16  24  24  31  5
M20  30  30  37  6
M24  36  36  45  6
M30  46  45  58  8
M36  55  54  68  10

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- fasteners.eu: DIN 6331 hexagon nuts with collar, height 1.5 d: a, d1, e, m, s — web — Publisher's page; dimensions are facts — https://www.fasteners.eu/standards/DIN/6331/
- Ganter: DIN 6331 hex nuts with collar — web — Publisher's page; dimensions are facts — https://reiman.pt/pub/media/technical_data/GANTER/datasheets/DIN 6331.pdf
- AMF: Hexagonal nuts with collar 1.5 d high — web — Publisher's page; dimensions are facts — https://www.amf.de/en_us/hexagonal-nuts-with-collar-15-d-high-82230

Free files (CC BY 4.0, Xem Studio; STEP + STL, 9 parts): https://xemstudio.com/files/hardware/hex-nuts-collar-din-6331/index.json
API: https://xemstudio.com/api/geometry?object=hex-nuts-collar-din-6331