# Hex weld nuts, DIN 929: M3–M16 pilot diameter, height, across flats, sheet thickness range

> What are the dimensions of a DIN 929 hexagon weld nut, and what hole does an M8 weld nut need?

- Category: Hardware › Fasteners
- Kind: Standard part
- Basis: fasten.it's DIN 929 table (12/2013), cross-checked on m, s, e and the pilot diameter against GlobalFastener's DIN 929 table; numbers only
- Page: https://xemstudio.com/objects/weld-nuts-din-929/ · JSON: https://xemstudio.com/api/geometry?object=weld-nuts-din-929 · Plain text: https://xemstudio.com/objects/weld-nuts-din-929/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); files CC BY 4.0 or their publisher's license
- Use in every chat: add https://xemstudio.com/mcp as a connector (https://xemstudio.com/use-with-ai/)

**Exact dimensions.** True size, with no tolerance added.

## Notes

- Columns (mm) as fasten.it prints them: d thread, P pitch, d2 (tolerance d11, the projection / pilot diameter), m height (h14), s width across flats (h13), e across corners (min), d3 (H13, equal to d2 in every row, shown once), a sheet thickness range as a minimum to maximum. GlobalFastener's DIN 929 table agrees with fasten.it on m, s, e and d2 for every size M3 to M16 (e.g. M8: m 6.5, s 14, e 15.38, d2 10.5; M10: 8, 17, 18.74, 12.5). Its flattened layout was read with inferred column alignment, so only these four quantities were compared.
- d2 is read as the diameter of the centring projection and d3 (equal to d2 in every row, with an H13 tolerance class) as the matching sheet-hole diameter; the page does not say so, so check a maker drawing. The projection heights (GlobalFastener h1 0.55 to 1.8, h2 0.25 to 1.0 max) and the weld projection geometry are not described well enough to draw. The standard covers coarse thread M3 to M16 and fine thread 8 to 16 mm, product grade A (fasten.it); GlobalFastener also lists a 7/16-20 UNF size, not tabulated here. Sizes in brackets, such as M14, are non-preferred (GlobalFastener).
- No file: the weld projections and the underside shape are not published as numbers in the sources read. Rivet nuts (blind threaded inserts, no welding): rivet-nuts-flat-head. McMaster-Carr sells projection weld nuts with per-part STEP; the category is linked, not copied.

## Sizes

| thread | P (mm) | d2 (pilot dia, d11) | m (height, h14) | s (across flats, h13) | e min | d3 (H13) | a (sheet thickness) |
|---|---|---|---|---|---|---|---|
| M3 | 0.5 | 4.5 | 3 | 7.5 | 8.15 | 4.5 | 0.63–1.5 |
| M4 | 0.7 | 6 | 3.5 | 9 | 9.83 | 6 | 0.75–1.5 |
| M5 | 0.8 | 7 | 4 | 10 | 10.95 | 7 | 0.88–2 |
| M6 | 1 | 8 | 5 | 11 | 12.02 | 8 | 0.88–2.5 |
| M8 | 1.25 | 10.5 | 6.5 | 14 | 15.38 | 10.5 | 1–3 |
| M10 | 1.5 | 12.5 | 8 | 17 | 18.74 | 12.5 | 1.25–4 |
| M12 | 1.75 | 14.8 | 10 | 19 | 20.91 | 14.8 | 1.5–5 |
| M14 | 2 | 16.8 | 11 | 22 | 24.27 | 16.8 | 2–6 |
| M16 | 2 | 18.8 | 13 | 24 | 26.51 | 18.8 | 2–6 |

## Where the files are

- fasten.it: [DIN 929 hexagon weld nuts (12/2013): d2, m, s, e, d3, sheet thickness a, M3 to M16](https://fasten.it/norms/norm/din_929) — web — Reference page; numbers only
- GlobalFastener: [DIN 929 hexagon weld nuts: b, d1, d2, d3, e, h1, h2, m, s (max / min) M3 to M16 and 7/16-20 UNF](https://www.globalfastener.com/standards/detail_256.html) — web — Reference page; column alignment inferred by the page
- McMaster-Carr: [Projection weld nuts (free STEP/IGES per part, for your own design use; no redistribution)](https://mcmaster.com/products/projection-weld-nuts) — STEP, IGES, PDF — McMaster-Carr site terms: personal design use, no redistribution (verify at link)

## Questions

**What hole size for an M8 DIN 929 weld nut?**

d2 (read as the pilot) is 10.5 mm (d11); the nut is 6.5 mm high, 14 mm across flats, for sheet 1 to 3 mm (fasten.it).

**What is the wrench size of an M10 weld nut?**

s = 17 mm (e min 18.74), m = 8 mm.

## Fits with

- [Hex nuts, M2–M8 (ISO 4032)](https://xemstudio.com/objects/hex-nuts-metric/)
- [Hex nuts, M10 to M24 (ISO 4032 / DIN 934)](https://xemstudio.com/objects/hex-nuts-metric-m10-m24/)
- [Rivet nuts (blind threaded inserts), flat head: hole size, grip range, body and flange dimensions, M3–M12 and #6-32 to 3/8-16](https://xemstudio.com/objects/rivet-nuts-flat-head/)
- [PEM self-clinching nuts (S, CLS, CLSS): hole size, minimum edge distance, nut diameter and height, M2–M12 and #2-56 to 3/8-24 + hole gauges](https://xemstudio.com/objects/pem-self-clinching-nuts-s-cls/)
- [Hex flange nuts, DIN 6923: M3–M20 across flats, flange diameter, height, flange thickness + M5–M16 envelope files](https://xemstudio.com/objects/flange-nuts-din-6923/)