Acorn (domed cap) nuts, DIN 1587 high type: M4–M24 dome diameter, overall height, across flats, thread depth — dimension sheet Source: Xem Studio, https://xemstudio.com/objects/acorn-cap-nuts-din-1587/ (sheet CC BY 4.0) Basis: fasten.it's DIN 1587 table (07/2014) cross-checked against Westfield Fasteners' DIN 1587 table (same dk, h, s, t, e on M4 to M24; m differs, see notes); numbers only Catalog version: 2026-10-20 Sizes: see table below - Columns (mm): P pitch; dk max, read as the dome diameter; h overall height (nominal = max); m max, read as the thread / body height; s width across flats (nominal = max; values in brackets are the alternative wrench widths the page prints for M10, M12, M14 and M22); e across corners (min); t min / max; x or g2 as printed on the right (x max for M4 to M10, g2 max for M12 and larger). The letters are the ones the pages print; fasten.it does not define them. Westfield's table (da, dk, dw, e, x, g2, h, m, r, s, t, w) agrees with fasten.it on dk, h, s, t and e (grade A minimum) for every size M4 to M24. The two disagree on m: fasten.it's coarse-thread m max is 10 for M10 (11.7 M12), Westfield prints m min 8.00 / max 7.64 for M10 (10.00 / 9.64 for M12), which equal fasten.it's fine-thread m (8.0, 10.0); the coarse values shown are fasten.it's and m is uncertain. - fasten.it also has a fine-thread table (M8x1 to M24x2) with the same dk, h and s but smaller m (e.g. M10x1.25: m 8.0 against 10.0 coarse); it is not reproduced here. fasten.it's M22x1.5 row prints t min 25.58 against 28.58 for M22x2, and the M27 and M30 coarse rows print fewer values than the columns, so they are left out. Grade A and B minimum figures are in Westfield's table (e.g. M8 e min 14.38 for grade A, 14.20 max for grade B). - No file: the dome profile (the radius r is only an auxiliary dimension) and the thread depth do not define a full solid in the sources read. McMaster-Carr sells acorn and cap nuts with per-part STEP; its metric acorn and cap-nut categories are linked, not copied. Nylon-insert nuts (domed or hex): nylon-insert-lock-nuts-iso-7040-din-985. thread P (mm) dk max h (nom = max) m max s (nom = max) e min t min / max x or g2 max M4 0.7 6.5 8 4.1 7 7.66 5.26 / 5.74 x 1.4 M5 0.8 7.5 10 5.4 8 8.79 7.21 / 7.79 x 1.6 M6 1 9.5 12 6 10 11.05 7.71 / 8.29 x 2 M8 1.25 12.5 15 8.5 13 14.38 10.7 / 11.4 x 2.5 M10 1.5 15 18 10 16 (17) 17.77 12.7 / 13.4 x 3 M12 1.75 17 22 11.7 18 (19) 20.03 15.7 / 16.4 g 6.4 M14 2 20 25 13 21 (22) 23.35 17.7 / 18.4 g 7.3 M16 2 23 28 16 24 26.75 20.6 / 21.4 g 7.3 M18 2.5 26 32 18.7 27 29.56 24.6 / 25.4 g 9.3 M20 2.5 28 34 19.7 30 32.95 25.6 / 26.4 g 9.3 M22 2.5 33 39 22.7 32 (34) 37.29 28.6 / 29.4 g 9.3 M24 3 34 42 23.5 36 39.55 30.5 / 31.5 g 10.7 Files elsewhere (not hosted by Xem Studio; license as stated by the publisher): - fasten.it: DIN 1587 hexagon domed cap nuts, high type (07/2014): d, P, da, dk, dw, e, x, g2, h, m, r, s, t, w; coarse M4 to M30 and fine thread — web — Reference page; numbers only. The page does not define the column letters — https://fasten.it/norms/norm/din_1587 - Westfield Fasteners: DIN 1587 dome nuts M4 to M24: da, dk, dw, e, h, m, r, s, t, w (Table 1) — web — Publisher's page; dimensions are facts — https://westfieldfasteners.co.uk/Standards/Nut-Dome-M.pdf - McMaster-Carr: Metric acorn nuts (free STEP/IGES per part, for your own design use; no redistribution) — STEP, IGES, PDF — McMaster-Carr site terms: personal design use, no redistribution [verify license at link] — https://www.mcmaster.com/metric-acorn-nuts - McMaster-Carr: Metric cap nuts (free STEP/IGES per part, for your own design use; no redistribution) — STEP, IGES, PDF — McMaster-Carr site terms: personal design use, no redistribution [verify license at link] — https://www.mcmaster.com/products/metric-cap-nuts/ No true-size file yet: the published figures do not fix the whole shape; a measured scan is planned. API: https://xemstudio.com/api/geometry?object=acorn-cap-nuts-din-1587