# Short-link chain DIN 766 and DIN 5685: wire diameter, pitch, inside and outside width

> What are the dimensions of DIN 766 and DIN 5685 short-link chain: wire diameter, pitch, inside width, outside width?

- Category: Hardware › Rigging
- Kind: Standard part
- Basis: fasteners.eu and SCIC Chain for DIN 766 (they disagree on b1 above 10 mm and are shown side by side); RS Components, Kramp and Load-Tech for DIN 5685; numbers only, load ratings left out
- Page: https://xemstudio.com/objects/short-link-chain-din-766-din-5685/ · JSON: https://xemstudio.com/api/geometry?object=short-link-chain-din-766-din-5685 · Plain text: https://xemstudio.com/objects/short-link-chain-din-766-din-5685/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 766 is the short-link round steel chain (calibrated, for chain wheels); the columns are the standard's letters as the sources head them: d wire diameter, t pitch (inside length), b1 minimum inside width, b2 maximum outside width, length of 11 pitches, mass per metre. The fasteners.eu table lists d 4 to 42 mm; the SCIC Chain table lists 10 to 42 mm (it names its rows d × t, so 10 × 28 is d 10, t 28).
- The two DIN 766 tables agree on pitch t and outside width b2 for every size they share (10, 13, 16, 18, 20, 23, 26, 30, 36, 42) but not on the minimum inside width b1: fasteners.eu prints b1 = 1.2 × d (for example 12 for d 10, 15.6 for d 13, 24 for d 20, 50 for d 42) while SCIC prints b1 = 1.4 × d at most sizes (14 for d 10, 18 for d 13, 28 for d 20, 54.5 for d 42). Both are shown; which belongs to your edition of the standard is not decided here. Check b1 against the standard you work to before sizing a mating part.
- DIN 5685 is the short, medium and long link chain family (not calibrated). The RS Components datasheet gives, for each chain size, the link style, the inside link length with its tolerance and the minimum inside link width; its table covers 2.5 to 7 mm and carries the note that the 6.5 mm row is not a preferred size covered by DIN 5685:1991 (the note's placement in the extracted text is ambiguous; it is repeated here for the 6.5 mm row only). One Kramp listing (Ø5 mm × 21 mm, sold as DIN 5685 short link) shows inner length 21 mm, which agrees with RS, inner width 10 mm and outer sizes 31 × 20 mm; that listing is a sold chain's actual size, not a limit, and the RS minimum inside width for Ø5 is 9.0 mm. Load-Tech's DIN 5685A table (gauge, step, width B) is shown as printed with its own caution that actual dimensions may differ; it is not cross-checked against RS (its step values equal RS inside lengths for 3, 4, 5 and 6 mm, which is what 'step' appears to mean there).
- Chain for lifting is not covered here: DIN 766 and DIN 5685 are general-purpose chain, and the page leaves out breaking and working loads on purpose. Alloy lifting chain (Grade 80, 100) and proof coil: welded-link-chain-nacm-grades-30-43-70-80-100.
- No file: a chain link's end radii, weld and the link bend are not published as numbers in the tables read. McMaster-Carr sells chain with per-part STEP; its chain categories are linked, not copied.

## Sizes

| standard / link style | designation | wire dia d (mm) | pitch t / inside length (mm) | inside width b1 (mm) | outside width b2 (mm) | length of 11 t (mm) | mass (kg/m) | second source / cross-check |
|---|---|---|---|---|---|---|---|---|
| DIN 766 | 4 × 16 | 4 | 16 | 4.8 min | 13.6 max | 176 | 0.32 | — |
| DIN 766 | 5 × 18.5 | 5 | 18.5 | 6 min | 17 max | 203.5 | 0.5 | — |
| DIN 766 | 6 × 18.5 | 6 | 18.5 | 7.2 min | 20.4 max | 203.5 | 0.8 | — |
| DIN 766 | 7 × 22 | 7 | 22 | 8.4 min | 23.8 max | 242 | 1.1 | — |
| DIN 766 | 8 × 24 | 8 | 24 | 9.6 min | 27.2 max | 264 | 1.4 | — |
| DIN 766 | 9 × 27 | 9 | 27 | 10.8 min | 30.6 max | 297 | 1.8 | — |
| DIN 766 | 10 × 28 | 10 | 28 | 12 min | 36 max | 308 | 2.3 | pitch 28, b1 14 min, b2 36 max |
| DIN 766 | 11 × 31 | 11 | 31 | 13.2 min | 40 max | 341 | 2.7 | — |
| DIN 766 | 13 × 36 | 13 | 36 | 15.6 min | 47 max | 396 | 3.9 | pitch 36, b1 18 min, b2 47 max |
| DIN 766 | 14 × 41 | 14 | 41 | 16.8 min | 50 max | 451 | 4.4 | — |
| DIN 766 | 16 × 45 | 16 | 45 | 19.2 min | 58 max | 495 | 5.8 | pitch 45, b1 22.5 min, b2 58 max |
| DIN 766 | 18 × 50 | 18 | 50 | 21.6 min | 65 max | 550 | 7.4 | pitch 50, b1 25 min, b2 65 max |
| DIN 766 | 20 × 56 | 20 | 56 | 24 min | 72 max | 616 | 9 | pitch 56, b1 28 min, b2 72 max |
| DIN 766 | 23 × 64 | 23 | 64 | 27.6 min | 83 max | 704 | 12 | pitch 64, b1 32 min, b2 83 max |
| DIN 766 | 26 × 73 | 26 | 73 | 31.2 min | 94 max | 803 | 15 | pitch 73, b1 34 min, b2 94 max |
| DIN 766 | 28 × 78 | 28 | 78 | 33.6 min | 101 max | 858 | 18 | — |
| DIN 766 | 30 × 84 | 30 | 84 | 36 min | 108 max | 924 | 20 | pitch 84, b1 39 min, b2 108 max |
| DIN 766 | 32 × 90 | 32 | 90 | 38.4 min | 115 max | 990 | 23 | — |
| DIN 766 | 36 × 101 | 36 | 101 | 43.2 min | 130 max | 1111 | 29 | pitch 101, b1 47 min, b2 130 max |
| DIN 766 | 40 × 112 | 40 | 112 | 48 min | 144 max | 1232 | 35 | — |
| DIN 766 | 42 × 118 | 42 | 118 | 50 min | 151 max | 1298 | 40 | pitch 118, b1 54.5 min, b2 151 max |
| DIN 766 | 33 × 92 | 33 | 92 | not in that table | not in that table | — | — | SCIC only: pitch 92, b1 43 min, b2 119 max |
| DIN 766 | 39 × 109 | 39 | 109 | not in that table | not in that table | — | — | SCIC only: pitch 109, b1 50.5 min, b2 140 max |
| DIN 5685 long link (RS) | 2.5 × inside length 24 | 2.5 | inside length 24 ± 1.2 | 4.5 min | — | — | — | — |
| DIN 5685 short link (RS) | 2.5 × inside length 14 | 2.5 | inside length 14 ± 0.7 | 4.5 min | — | — | — | — |
| DIN 5685 long link (RS) | 3 × inside length 26 | 3 | inside length 26 ± 1.3 | 5.4 min | — | — | — | — |
| DIN 5685 medium link (RS) | 3 × inside length 21 | 3 | inside length 21 ± 1.1 | 5.4 min | — | — | — | — |
| DIN 5685 short link (RS) | 3 × inside length 16 | 3 | inside length 16 ± 0.8 | 5.4 min | — | — | — | — |
| DIN 5685 long link (RS) | 4 × inside length 32 | 4 | inside length 32 ± 1.6 | 7.2 min | — | — | — | — |
| DIN 5685 short link (RS) | 4 × inside length 19 | 4 | inside length 19 ± 1.0 | 7.2 min | — | — | — | — |
| DIN 5685 long link (RS) | 5 × inside length 35 | 5 | inside length 35 ± 1.8 | 9.0 min | — | — | — | — |
| DIN 5685 short link (RS) | 5 × inside length 21 | 5 | inside length 21 ± 1.1 | 9.0 min | — | — | — | Kramp Ø5 × 21 short link: inner length 21 (agrees), inner width 10, outer width 20, outer length 31 |
| DIN 5685 long link (RS) | 6 × inside length 42 | 6 | inside length 42 ± 2.1 | 10.8 min | — | — | — | — |
| DIN 5685 short link (RS) | 6 × inside length 24 | 6 | inside length 24 ± 1.2 | 10.8 min | — | — | — | — |
| DIN 5685 long link (RS) | 6.5 × inside length 36 | 6.5 | inside length 36 ± 2.4 | 12.0 min | — | — | — | — |
| DIN 5685 long link (RS) | 7 × inside length 49 | 7 | inside length 49 ± 2.5 | 12.6 min | — | — | — | — |
| DIN 5685A (Load-Tech, as printed) | 2×14 | 2 | step 14 | — | width B 8 | — | — | weights and loads on the page left out |
| DIN 5685A (Load-Tech, as printed) | 3×16 | 3 | step 16 | — | width B 11 | — | — | weights and loads on the page left out |
| DIN 5685A (Load-Tech, as printed) | 4×19 | 4 | step 19 | — | width B 15 | — | — | weights and loads on the page left out |
| DIN 5685A (Load-Tech, as printed) | 5×21 | 5 | step 21 | — | width B 19 | — | — | weights and loads on the page left out |
| DIN 5685A (Load-Tech, as printed) | 6×24 | 6 | step 24 | — | width B 22 | — | — | weights and loads on the page left out |
| DIN 5685A (Load-Tech, as printed) | 7×28 | 7 | step 28 | — | width B 27 | — | — | weights and loads on the page left out |
| DIN 5685A (Load-Tech, as printed) | 8×32 | 8 | step 32 | — | width B 32 | — | — | weights and loads on the page left out |
| DIN 5685A (Load-Tech, as printed) | 10×40 | 10 | step 40 | — | width B 40 | — | — | weights and loads on the page left out |
| DIN 5685A (Load-Tech, as printed) | 12×48 | 12 | step 48 | — | width B 48 | — | — | weights and loads on the page left out |

## Where the files are

- fasteners.eu: [DIN 766: d, tolerance, pitch t, inside width b1 (min), outside width b2 (max), length of 11 × t, mass kg/m (table as read, d 4 to 42 mm)](https://www.fasteners.eu/standards/DIN/766/) — web — Reference page; numbers only
- SCIC Chain: [DIN 766 round steel link chain dimensions: nominal size d × t, pitch t, inner b1 (min), outer b2 (max), 10 to 42 mm](https://www.scic-chain.com/high-quality-din766-short-steel-link-chain-product/) — web — Maker page; numbers only
- RS Components datasheet: [Chain to DIN 5685: chain size, link reference (short / medium / long), inside link length with tolerance, minimum inside link width, 2.5 to 7 mm](https://assets.rs-online.com/v1699607124/Datasheets/0cd567ece51126a359dfecc6acc9d0fd.pdf) — web — Maker datasheet; numbers only
- Kramp: [Welded chain Ø5 mm × 21 mm, galvanised, listed as DIN 5685 short link: inner length 21, inner width 10 (cross-check)](https://kramp.com/shop-us/en/p/well-chain-%C3%B85mm-x-21mm-galvanised--1550041150) — web — Distributor listing; numbers only
- Load-Tech: [Short link chain DIN 5685A: chain gauge D, step T, width B, 2 to 12 mm (as printed; 'actual dimensions may differ')](https://load-tech.com.ua/en/round-link-chains/98-short-link-chain-din-5685a.html) — web — Maker page; numbers only
- McMaster-Carr: [Chain, all types (lifting, tethering, binding and others) (free STEP/IGES per part, for your own design use; no redistribution)](https://www.mcmaster.com/products/lifting-chain/) — STEP, IGES, PDF — McMaster-Carr site terms: personal design use, no redistribution (verify at link)

## Questions

**What is the pitch of 8 mm DIN 766 chain?**

24 mm (fasteners.eu), with minimum inside width 9.6 mm and maximum outside width 27.2 mm in that table.

**Do the sources agree on the inside width of DIN 766 chain?**

No. For d 10 fasteners.eu prints b1 = 12 mm and SCIC Chain prints 14 mm; pitch and outside width agree. Both are on the page.

**What are the inside length and minimum inside width of 5 mm DIN 5685 chain?**

Short link: 21 ± 1.1 mm and 9.0 mm minimum (RS Components); long link: 35 ± 1.8 mm and 9.0 mm minimum.

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