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Wave Spring Washer Dimensions (DIN 137 Form B, M3 to M33)
Guide · Updated October 28, 2026
DIN 137 covers solid spring washers, curved (form A) and waved (form B); this chart is form B, M3 to M33. Values agree across the fasteners.eu DIN 137 B table, the Westfield Fasteners DIN 137 spec, the Spinelli DIN 137 B sheet, the Bohrenfeldt DIN 137 B sheet (to M24, no h max) and the Mirimpex DIN 137 B brochure (to M22); M30 and M33 rest on fasteners.eu and Westfield. Conflicting cells are shown as a dash. Check your supplier for critical work.
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Step by step
- Pick the size: Choose by thread, M3 to M33.
- Read the hole: d1 is the hole (H14).
- Read the OD: d2 is the OD (js16); check it fits the bearing face.
- Read the thickness: s is the material thickness.
- Check free height: h min and max is the uncompressed wave height.
- Order it: Designate as Spring washer DIN 137 B 8.
DIN 137 B wave spring washer dimensions (mm)
Columns: thread, hole d1, OD d2, thickness s, free height h min and h max.
- Thread | d1 | d2 | s | h min | h max
- M3 | 3.2 | 8 | 0.5 | 0.8 | 1.6
- M3.5 | 3.7 | 8 | 0.5 | 0.9 | 1.8
- M4 | 4.3 | 9 | 0.5 | 1 | 2
- M5 | 5.3 | 11 | 0.5 | 1.1 | 2.2
- M6 | 6.4 | 12 | — | 1.3 | 2.6
- M7 | 7.4 | 14 | 0.8 | 1.5 | 3
- M8 | 8.4 | 15 | 0.8 | 1.5 | 3
- M10 | 10.5 | — | 1 | 2.1 | 4.2
- M12 | 13 | 24 | 1.2 | 2.5 | 5
- M14 | 15 | 28 | 1.6 | 3 | 6
- M16 | 17 | 30 | 1.6 | 3.2 | 6.4
- M18 | 19 | 34 | 1.6 | 3.3 | 6.6
- M20 | 21 | 36 | 1.6 | 3.7 | 7.4
- M22 | 23 | 40 | — | 3.9 | 7.8
- M24 | 25 | 44 | 1.8 | 4.1 | 8.2
- M27 | 28 | 50 | 2 | 4.7 | 9.4
- M30 | 31 | 56 | 2.2 | 5 | 10
- M33 | 34 | 60 | 2.2 | 5.3 | 10.6
Worked example: M8 screw
An M8 DIN 137 B washer has an 8.4 mm hole, 15 mm OD, is 0.8 mm thick and stands 1.5 to 3 mm high before tightening.
Common problems
- Will not fit the bearing face: check d2.
- Flattens with little hold: DIN 137 B is for light preload; see DIN 6796 for bolted joints.
- Mixed with DIN 128: DIN 128 is split; DIN 137 is a solid ring.
FAQ
What is DIN 137?
A solid (unsplit) spring washer: form A is curved, form B is waved. This chart is form B.
Is form A charted?
No. Only one source with a readable form A table was found, so it is not charted.
Why is the M6 thickness blank?
Sources disagree: fasteners.eu, Westfield and Spinelli give 0.5 mm; the Mirimpex sheet gives 0.8 mm.
Why is the M10 OD blank?
Sources disagree: 21 mm in most tables, 18 mm in the Mirimpex sheet.
Why is the M22 thickness blank?
Sources disagree: 1.8 mm in most tables, 1.5 mm in the Spinelli sheet.
DIN 137 vs DIN 6796?
DIN 137 B is a thin waved washer for light preload; DIN 6796 is a thick hardened cone for bolted joints.
What was skipped?
Form A, M36, weights, tolerance limits and the cells noted above.
Related guides and calculators
- Conical spring washer dimensions (DIN 6796)
- Spring lock washer dimensions (DIN 127 B)
- Curved spring washer dimensions (DIN 128 A)
- Serrated lock washer dimensions (DIN 6798)
- Tooth lock washer dimensions (DIN 6797)
- All free machinist calculators
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