# Wave spring washers: DIN 137 types A and B (M1.4–M36), bearing preload wave washers, Smalley wave spring example

> What are the dimensions of a DIN 137 wave washer (M6, M8, M10), and which one preloads a bearing?

- Category: Hardware › Fasteners
- Kind: Standard part
- Basis: Westfield Fasteners' DIN 137 tables (type A M1.4 to M10, type B M3 to M36) cross-checked with ITA Fasteners' table (A / B M3 to M36, bearing wave washers) and Olander's M3 listing; one Smalley part as printed by IMS Supply; numbers only
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**Exact dimensions.** True size, with no tolerance added.

## Notes

- Millimetres unless marked. DIN 137 wave (curved) spring washers: bore d1, outside diameter d2, thickness s, free height h min / max, for the thread the washer suits. Westfield notes the standard has been withdrawn without a direct replacement, but the washers are still made to it. Type B is tabulated M3 to M36 with a thickness tolerance (H14 on the bore, js16 on the OD per Westfield). ITA prints one table for 'A / B' with the same numbers as Westfield's type B for every size M3 to M36 (and Olander's M3 DIN 137 B: ID 3.2, OD 8, thickness 0.5, height 0.8 to 1.6, in agreement).
- Disagreement: Westfield's type A table (M1.4 to M10) has different, smaller values for the same thread (M3 type A: OD 6, thickness 0.4, height 0.65 to 1.3; type B / ITA: OD 8, 0.5, 0.8 to 1.6). Both are shown with the source named; ITA does not separate A from B.
- Bearing wave washers (ITA WB series, thickness ±0.1) fit between a bearing's outer ring and housing shoulder to preload it; the table gives the outside diameter De and inside diameter di limits and thickness T for the bearing type listed. ITA's load and height-at-load columns are not reproduced.
- Smalley's multi-turn crest-to-crest wave springs are made in many sizes (catalogue tables by part number were not readable); one real part is shown as printed: CS075-L4, bore 0.750 in, shaft clearance 0.550 in, thickness 0.008 in, free height 0.500 in (reference), 3.5 waves per turn, 6 turns, 2 shims. No Smalley table, so no series is claimed.
- No files: the wave amplitude profile (number of waves, crest shape) is not published as numbers in any table read, so a model would be invented. Conical forms: conical-spring-washers-din-6796. McMaster-Carr sells wave washers with per-part STEP; linked, not copied.

## Sizes

| standard / source | size | bore d1 (mm) | OD d2 (mm) | thickness s (mm) | s tolerance | free height h min / max (mm) |
|---|---|---|---|---|---|---|
| DIN 137 type A (Westfield) | M1.4 | 1.5 | 3.0 | 0.25 | — | 0.4 / 0.8 |
| DIN 137 type A (Westfield) | M1.6 | 1.8 | 4.0 | 0.25 | — | 0.45 / 0.9 |
| DIN 137 type A (Westfield) | M1.7 | 1.8 | 4.0 | 0.25 | — | 0.45 / 0.9 |
| DIN 137 type A (Westfield) | M2 | 2.2 | 4.5 | 0.3 | — | 0.5 / 1.0 |
| DIN 137 type A (Westfield) | M2.3 | 2.5 | 5.0 | 0.3 | — | 0.5 / 1.0 |
| DIN 137 type A (Westfield) | M2.5 | 2.6 | 5.5 | 0.3 | — | 0.55 / 1.1 |
| DIN 137 type A (Westfield) | M2.6 | 2.8 | 5.5 | 0.3 | — | 0.55 / 1.1 |
| DIN 137 type A (Westfield) | M3 | 3.2 | 6.0 | 0.4 | — | 0.65 / 1.3 |
| DIN 137 type A (Westfield) | M3.5 | 3.7 | 7.0 | 0.4 | — | 0.7 / 1.4 |
| DIN 137 type A (Westfield) | M4 | 4.3 | 8.0 | 0.5 | — | 0.8 / 1.6 |
| DIN 137 type A (Westfield) | M5 | 5.3 | 10.0 | 0.5 | — | 0.9 / 1.8 |
| DIN 137 type A (Westfield) | M6 | 6.4 | 11.0 | 0.5 | — | 1.1 / 2.2 |
| DIN 137 type A (Westfield) | M7 | 7.4 | 12.0 | 0.5 | — | 1.2 / 2.4 |
| DIN 137 type A (Westfield) | M8 | 8.4 | 15.0 | 0.5 | — | 1.7 / 3.4 |
| DIN 137 type A (Westfield) | M10 | 10.5 | 18.0 | 0.8 | — | 2.0 / 4.0 |
| DIN 137 type B (Westfield; ITA identical) | M3 | 3.2 | 8 | 0.5 | ±0.05 | 0.8 / 1.6 |
| DIN 137 type B (Westfield; ITA identical) | M3.5 | 3.7 | 8 | 0.5 | ±0.05 | 0.9 / 1.8 |
| DIN 137 type B (Westfield; ITA identical) | M4 | 4.3 | 9 | 0.5 | ±0.05 | 1 / 2 |
| DIN 137 type B (Westfield; ITA identical) | M5 | 5.3 | 11 | 0.5 | ±0.05 | 1.1 / 2.2 |
| DIN 137 type B (Westfield; ITA identical) | M6 | 6.4 | 12 | 0.5 | ±0.05 | 1.3 / 2.6 |
| DIN 137 type B (Westfield; ITA identical) | M7 | 7.4 | 14 | 0.8 | ±0.06 | 1.5 / 3 |
| DIN 137 type B (Westfield; ITA identical) | M8 | 8.4 | 15 | 0.8 | ±0.06 | 1.5 / 3 |
| DIN 137 type B (Westfield; ITA identical) | M10 | 10.5 | 21 | 1 | ±0.07 | 2.1 / 4.2 |
| DIN 137 type B (Westfield; ITA identical) | M12 | 13 | 24 | 1.2 | ±0.07 | 2.5 / 5 |
| DIN 137 type B (Westfield; ITA identical) | M14 | 15 | 28 | 1.6 | ±0.08 | 3 / 6 |
| DIN 137 type B (Westfield; ITA identical) | M16 | 17 | 30 | 1.6 | ±0.08 | 3.2 / 6.4 |
| DIN 137 type B (Westfield; ITA identical) | M18 | 19 | 34 | 1.6 | ±0.08 | 3.3 / 6.6 |
| DIN 137 type B (Westfield; ITA identical) | M20 | 21 | 36 | 1.6 | ±0.08 | 3.7 / 7.4 |
| DIN 137 type B (Westfield; ITA identical) | M22 | 23 | 40 | 1.8 | ±0.1 | 3.9 / 7.8 |
| DIN 137 type B (Westfield; ITA identical) | M24 | 25 | 44 | 1.8 | ±0.1 | 4.1 / 8.2 |
| DIN 137 type B (Westfield; ITA identical) | M27 | 28 | 50 | 2 | ±0.1 | 4.7 / 9.4 |
| DIN 137 type B (Westfield; ITA identical) | M30 | 31 | 56 | 2.2 | ±0.1 | 5 / 10 |
| DIN 137 type B (Westfield; ITA identical) | M33 | 34 | 60 | 2.2 | ±0.1 | 5.3 / 10.6 |
| DIN 137 type B (Westfield; ITA identical) | M36 | 37 | 68 | 2.5 | ±0.15 | 5.8 / 11.6 |
| bearing wave washer WB-312604 (ITA), for bearing 6201 | — | di 26.50 / 26.90 | De 31.20 / 31.50 | 0.4 | ±0.1 | — |
| bearing wave washer WB-383304 (ITA), for bearing 6203 | — | di 33.00 / 33.50 | De 38.50 / 39.00 | 0.4 | ±0.1 | — |
| bearing wave washer WB-453905 (ITA), for bearing 6204 | — | di 39.50 / 40.00 | De 45.50 / 46.00 | 0.5 | ±0.1 | — |
| bearing wave washer WB-494005 (ITA), for bearing 6205 / 6304 | — | di 40.50 / 41.00 | De 49.50 / 50.00 | 0.5 | ±0.1 | — |
| bearing wave washer WB-596005 (ITA), for bearing 6206 / 6305 | — | di 49.70 / 50.30 | De 59.70 / 60.30 | 0.5 | ±0.1 | — |
| bearing wave washer WB-696005 (ITA), for bearing 6306 | — | di 60.00 / 60.50 | De 69.50 / 70.00 | 0.5 | ±0.1 | — |
| bearing wave washer WB-776905 (ITA), for bearing 6308 | — | di 69.50 / 70.00 | De 77.50 / 78.00 | 0.5 | ±0.1 | — |
| bearing wave washer WB-877705 (ITA), for bearing 6308 | — | di 77.50 / 78.00 | De 87.00 / 87.50 | 0.5 | ±0.1 | — |
| bearing wave washer WB-998108 (ITA), for bearing 6309 | — | di 81.50 / 82.00 | De 99.20 / 99.70 | 0.8 | ±0.1 | — |
| bearing wave washer WB-1098908 (ITA), for bearing 6310 / 6212 | — | di 89.50 / 90.00 | De 109.00 / 109.50 | 0.8 | ±0.1 | — |
| bearing wave washer WB-1199908 (ITA), for bearing 6213 | — | di 99.50 / 100.00 | De 119.00 / 120.00 | 0.8 | ±0.1 | — |
| bearing wave washer WB-12210508 (ITA), for bearing 6214 | — | di 105.00 / 105.50 | De 122.50 / 123.50 | 0.8 | ±0.1 | — |
| bearing wave washer WB-15713409 (ITA), for bearing 6215 / 6218 | — | di 134.50 / 135.50 | De 157.50 / 158.50 | 0.9 | ±0.1 | — |
| bearing wave washer WB-16814009 (ITA), for bearing 6318 / 6219 | — | di 140.00 / 140.50 | De 168.00 / 169.00 | 0.9 | ±0.1 | — |
| Smalley CS075-L4 crest-to-crest wave spring (IMS Supply), inch | — | shaft clearance 0.550 in | bore 0.750 in | 0.008 in (wire thickness t) | — | free height 0.500 in (reference) |

## Where the files are

- Westfield Fasteners: [DIN 137 wave / curved spring lock washers: type A (M1.4 to M10) and type B (M3 to M36): d1, d2, s, h min / max](https://westfieldfasteners.co.uk/Standards/Washer-SprgWav-M.html) — web — Publisher's page; dimensions are facts
- ITA Fasteners: [Wave washers: DIN 137 A / B (M3 to M36), bearing wave washers WB series, inch / mm table](https://itafasteners.com/products-washers-wave-ball.php) — web — Distributor page; numbers only
- Olander: [M3 wave spring washer DIN 137 B, stainless: ID 3.2, OD 8, thickness 0.5, height 0.8 to 1.6](https://www.olander.com/items/.3NWAVS) — web — Distributor page; numbers only
- IMS Supply (Smalley CS075-L4): [Smalley crest-to-crest wave spring CS075-L4: bore 0.750 in, shaft clearance 0.550 in, thickness 0.008 in, free height 0.500 in, 3.5 waves per turn, 6 turns](https://www.imssupply.com/catalog/smalley/cs075-l4.html) — web — Distributor page; numbers only
- McMaster-Carr: [Wave washers (spacers: washer type, wave) (free STEP/IGES per part, for your own design use; no redistribution)](https://www.mcmaster.com/spacers/washer-type~wave) — STEP, IGES, PDF — McMaster-Carr site terms: personal design use, no redistribution (verify at link)

## Questions

**What size is a DIN 137 B M8 wave washer?**

Bore 8.4 mm, OD 15 mm, thickness 0.8 mm (±0.06), free height 1.5 to 3.0 mm (Westfield and ITA).

**Which wave washer preloads a 6205 bearing?**

ITA lists WB-494005 for 6205 / 6304: De 49.50 to 50.00 mm, di 40.50 to 41.00 mm, thickness 0.5 mm.

**Why are there two M3 wave washer sizes?**

Westfield's type A is OD 6, 0.4 mm thick; type B (and ITA's A / B table) is OD 8, 0.5 mm thick. Check which form your supplier means.

## Fits with

- [Conical spring washers DIN 6796, M2–M125: bore, outside diameter, thickness, height, load to flat + 10 cone models](https://xemstudio.com/objects/conical-spring-washers-din-6796/)
- [Disc springs (Belleville washers) DIN 2093, series A / B / C: De, Di, t, free height l0, cone height h0, groups 1–3 + cone-solid models](https://xemstudio.com/objects/disc-springs-din-2093/)
- [Spring lock washers, DIN 127 B (split washers, rectangular section): M2–M100 bore, outside diameter, width, thickness, free height](https://xemstudio.com/objects/spring-lock-washers-din-127-b/)
- [Ball bearings, 683 to 6210 and flanged F6xx (ISO 15)](https://xemstudio.com/objects/ball-bearings-metric/)
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- [Metric shafts Ø3 to Ø10 with D-flats and clip grooves](https://xemstudio.com/objects/metric-shafts/)
- [Retaining rings DIN 471 (external, for shafts): ring dimensions and groove diameter d2 × width m, 3 to 100 mm](https://xemstudio.com/objects/retaining-rings-din-471-external/)