# Wing screws, DIN 316 (round wings, German form), M4–M24: boss, wing span, height and nominal lengths

> What are the dimensions of a DIN 316 wing screw, and what lengths does each size come in?

- Category: Hardware › Fasteners
- Kind: Standard part
- Basis: fasten.it DIN 316 table; numbers only. The values for d2, e, g1, h and m equal the minimum values of the DIN 315 wing nut D1, e, g, h and m for the same size, as printed by the same site
- Page: https://xemstudio.com/objects/wing-screws-din-316/ · JSON: https://xemstudio.com/api/geometry?object=wing-screws-din-316 · Plain text: https://xemstudio.com/objects/wing-screws-din-316/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); files CC BY 4.0 or their publisher's license
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**Exact dimensions.** True size, with no tolerance added.

## Notes

- DIN 316 is the wing screw with rounded wings, product grade C, M4 to M24; the table columns are the page's own letters (P pitch, a, d2, d3, e, g1, g2, h, m) in mm, with the minimum or maximum as headed. The page does not define the letters, so none is interpreted here. Comparing with the DIN 315 table from the same site: d2 equals D1 min, e equals e min, g1 equals g min, h equals h min and m equals m min for every size M4 to M24, so the wing and boss envelope of the screw is the same as the matching DIN 315 nut's minimum figures.
- Lengths are the commercial nominal lengths listed on the page for each size (mm); the length is not a dimension of the head. Material (steel, malleable iron, copper-zinc alloy) is named in the scope; property class is not given.
- DIN 316 is the metric 'German form' of the wing screw; the American form with edged wings is DIN 318 and is not on this page. Wing nuts: wing-nuts-din-315-asme-b18-17; knurled thumb screws: knurled-thumb-screws-din-464.
- No file: the wing outline is not published as numbers in the source read, so a drawing would be invented. McMaster-Carr lists thumb screws and wing-style hand screws with per-part STEP; its thumb-screw categories are linked, not copied.

## Sizes

| size | P (mm) | a max | d2 min | d3 min | e min | g1 min | g2 min | h min | m min | nominal lengths l (mm) |
|---|---|---|---|---|---|---|---|---|---|---|
| M4 | 0.7 | 2.1 | 6 | 5.5 | 18 | 1.1 | 1.7 | 8.5 | 3.2 | 6, 8, 10, 12, 14, 16, 18 |
| M5 | 0.8 | 2.4 | 8 | 7.5 | 24 | 1.5 | 2.3 | 11 | 4 | 8, 10, 12, 14, 16, 18, 20, 25, 30 |
| M6 | 1 | 3 | 10 | 9 | 30 | 1.5 | 2.7 | 15 | 5 | 8, 10, 12, 14, 16, 18, 20, 25, 30, 35, 40 |
| M8 | 1.25 | 4 | 13 | 10.5 | 36 | 2 | 3.6 | 18 | 6.5 | 10, 12, 14, 16, 18, 20, 25, 30, 35, 40, 45, 50 |
| M10 | 1.5 | 4.5 | 17 | 14.5 | 48 | 3.6 | 4.6 | 23 | 8 | 16, 18, 20, 25, 30, 35, 40, 45, 50 |
| M12 | 1.75 | 5.3 | 20 | 17.5 | 62 | 4.1 | 5.6 | 31 | 10 | 16, 18, 20, 25, 30, 35, 40, 45, 50, 60 |
| M16 | 2 | 6 | 26 | 21 | 70 | 5.6 | 6.5 | 35 | 13 | 20, 25, 30, 35, 40, 45, 50, 60 |
| M20 | 2.5 | 7.5 | 32 | 27 | 86 | 6.1 | 7 | 44 | 16 | 30, 35, 40, 45, 50, 60 |
| M24 | 3 | 9 | 41 | 35 | 106 | 8.6 | 9.5 | 53.5 | 20 | 35, 40, 45, 50, 60 |

## Where the files are

- fasten.it: [DIN 316 Standard Dimensions for wing screws with rounded wings (M4 to M24, product grade C, 1998-07): P, a, d2, d3, e, g1, g2, h, m; commercial lengths per size](https://fasten.it/norms/norm/din_316) — web — Reference page; numbers only. The page does not define the column letters
- fasten.it: [DIN 315 Standard Dimensions for wing nuts, rounded wings (M4 to M24, product class C): P, D1, e, h, g, m (max / min), DIN 315:1998-07](https://fasten.it/norms/norm/din_315) — web — Reference page; numbers only. The page does not define the column letters
- McMaster-Carr: [Knurled-head thumb screws (free STEP/IGES per part, for your own design use; no redistribution)](https://www.mcmaster.com/knurled-head-thumb-screws) — STEP, IGES, PDF — McMaster-Carr site terms: personal design use, no redistribution (verify at link)
- McMaster-Carr: [Metric steel thumb screws (free STEP/IGES per part, for your own design use; no redistribution)](https://www.mcmaster.com/metric-steel-thumb-screws) — STEP, IGES, PDF — McMaster-Carr site terms: personal design use, no redistribution (verify at link)

## Questions

**What lengths does an M6 DIN 316 wing screw come in?**

8, 10, 12, 14, 16, 18, 20, 25, 30, 35 and 40 mm on the fasten.it page.

**How wide is an M8 DIN 316 wing screw?**

The page prints e min 36 mm (wing span), height h min 18 mm and d2 min 13 mm; no maximum is printed for those columns.

**Is a DIN 316 wing screw the same size as a DIN 315 wing nut?**

For the same thread size the d2, e, g1, h and m minimum values equal the DIN 315 D1, e, g, h and m minimum values on the same site.

## Fits with

- [Wing nuts: DIN 315 M4–M24 and ASME B18.17 #4 to 3/4 — boss, wing spread, height, wing thickness](https://xemstudio.com/objects/wing-nuts-din-315-asme-b18-17/)
- [Knurled thumb screws, high type (DIN 464), M2–M10: head diameter, head height, shank, thread length, slot](https://xemstudio.com/objects/knurled-thumb-screws-din-464/)
- [Hex head screws, M3–M8 (ISO 4017)](https://xemstudio.com/objects/hex-head-screws-metric/)
- [Socket head cap screws, M2–M8 (ISO 4762 / DIN 912)](https://xemstudio.com/objects/socket-head-cap-screws-metric/)
- [Imperial machine screws: #4-40, #6-32, #8-32, 1/4-20](https://xemstudio.com/objects/imperial-machine-screws/)