DIN 127 B spring lock washer: dimensions from M3 to M24
Split spring washer with square-cut ends (form B), from M3 to M24. Pick a size to get its dimensions and CAD files.
DIN 127 spring washer dimensions
| Size | d1min, mm | d2max, mm | bnom, mm | snom, mm | hmin, mm | hmax, mm |
|---|---|---|---|---|---|---|
| M3 | 3.1 | 6.2 | 1.3 | 0.8 | 1.6 | 1.9 |
| M4 | 4.1 | 7.6 | 1.5 | 0.9 | 1.8 | 2.1 |
| M5 | 5.1 | 9.2 | 1.8 | 1.2 | 2.4 | 2.8 |
| M6 | 6.1 | 11.8 | 2.5 | 1.6 | 3.2 | 3.8 |
| M8 | 8.1 | 14.8 | 3 | 2 | 4 | 4.7 |
| M10 | 10.2 | 18.1 | 3.5 | 2.2 | 4.4 | 5.2 |
| M12 | 12.2 | 21.1 | 4 | 2.5 | 5 | 5.9 |
| M14 | 14.2 | 24.1 | 4.5 | 3 | 6 | 7.1 |
| M16 | 16.2 | 27.4 | 5 | 3.5 | 7 | 8.3 |
| M18 | 18.2 | 29.4 | 5 | 3.5 | 7 | 8.3 |
| M20 | 20.2 | 33.6 | 6 | 4 | 8 | 9.4 |
| M22 | 22.5 | 35.9 | 6 | 4 | 8 | 9.4 |
| M24 | 24.5 | 40 | 7 | 5 | 10 | 11.8 |
Dimensions in millimetres unless stated. Select a row to load its CAD files above.
DIN 127 spring washer CAD model
The free height h of the washer comes from its twisted shape. The CAD file draws it flat with its cut, at thickness s, which is how it is usually shown in assemblies.
Spring washer dimensions: section and free height
The section of the ring is b wide and s thick, and the free height h, between a minimum and a maximum, is how far the split ends stand apart before the washer is pressed flat. At M12 the section is 4 × 2.5 mm, the outside diameter up to 21.1 mm and the free height 5 to 5.9 mm. Form B has square-cut ends; form A has bent ends.
DIN 127 spring washers: common questions
- What are the dimensions of an M12 spring washer?
- A DIN 127 B M12 washer has a hole of at least 12.2 mm, an outside diameter of up to 21.1 mm, a 4 × 2.5 mm section and a free height of 5 to 5.9 mm.