DIN 127B Metric Helical Spring Split Washers are split metal rings bent into a helical shape with square/straight tangs at both ends. When the nut is tightened in the right-hand direction, the washer compresses and generates a spring force between the bolt and the workpiece, creating frictional resistance.
51Fasteners offers fasteners in a variety of materials and finishes, in both imperial and metric standards. DIN 127 B helical spring lock washers are available in materials such as carbon steel, 301/304/316 stainless steel, titanium alloys, aluminum alloys, copper alloys, and specialty alloys. Click the link to view related products: Helical Spring Washers.
DIN 127B Dimensions
Equivalent standards: CSN 021741; UNI 1751.
| mm | d min | d max | b max | b min | h max | h min | H min | H max | dc max |
|---|---|---|---|---|---|---|---|---|---|
| Φ2 | 2.1 | 2.4 | 1 | 0.8 | 0.6 | 0.4 | 1 | 1.2 | 4.5 |
| Φ2.2 | 2.3 | 2.6 | 1.1 | 0.9 | 0.7 | 0.5 | 1.2 | 1.4 | 4.8 |
| Φ2.5 | 2.6 | 2.9 | 1.1 | 0.9 | 0.7 | 0.5 | 1.2 | 1.4 | 5.1 |
| Φ3 | 3.1 | 3.4 | 1.4 | 1.2 | 0.9 | 0.7 | 1.6 | 1.9 | 6.2 |
| Φ3.5 | 3.6 | 3.9 | 1.4 | 1.2 | 0.9 | 0.7 | 1.6 | 1.9 | 6.7 |
| Φ4 | 4.1 | 4.4 | 1.6 | 1.4 | 1 | 0.8 | 1.8 | 2.1 | 7.6 |
| Φ5 | 5.1 | 5.4 | 1.9 | 1.7 | 1.3 | 1.1 | 2.4 | 2.8 | 9.2 |
| Φ6 | 6.1 | 6.5 | 2.65 | 2.35 | 1.7 | 1.5 | 3.2 | 3.8 | 11.8 |
| Φ7 | 7.1 | 7.5 | 2.65 | 2.35 | 1.7 | 1.5 | 3.2 | 3.8 | 12.8 |
| Φ8 | 8.1 | 8.5 | 3.15 | 2.85 | 2.1 | 1.9 | 4 | 4.7 | 14.8 |
| Φ10 | 10.2 | 10.7 | 3.7 | 3.3 | 2.35 | 2.05 | 4.4 | 5.2 | 18.1 |
| Φ12 | 12.2 | 12.7 | 4.2 | 3.8 | 2.65 | 2.35 | 5 | 5.9 | 21.1 |
| Φ14 | 14.2 | 14.7 | 4.7 | 4.3 | 3.15 | 2.85 | 6 | 7.1 | 24.1 |
| Φ16 | 16.2 | 17 | 5.2 | 4.8 | 3.7 | 3.3 | 7 | 8.3 | 27.4 |
| Φ18 | 18.2 | 19 | 5.2 | 4.8 | 3.7 | 3.3 | 7 | 8.3 | 29.4 |
| Φ20 | 20.2 | 21.2 | 6.2 | 5.8 | 4.2 | 3.8 | 8 | 9.4 | 33.6 |
| Φ22 | 22.5 | 23.5 | 6.2 | 5.8 | 4.2 | 3.8 | 8 | 9.4 | 35.9 |
| Φ24 | 24.5 | 25.5 | 7.25 | 6.75 | 5.2 | 4.8 | 10 | 11.8 | 40 |
| Φ27 | 27.5 | 28.5 | 7.25 | 6.75 | 5.2 | 4.8 | 10 | 11.8 | 43 |
| Φ30 | 30.5 | 31.7 | 8.25 | 7.75 | 6.2 | 5.8 | 12 | 14.2 | 48.2 |
| Φ36 | 36.5 | 37.7 | 10.25 | 9.75 | 6.2 | 5.8 | 12 | 14.2 | 58.2 |
| Φ39 | 39.5 | 40.7 | 10.25 | 9.75 | 6.2 | 5.8 | 12 | 14.2 | 61.2 |
| Φ42 | 42.5 | 43.7 | 12.25 | 11.75 | 7.25 | 6.75 | 14 | 16.5 | 68.2 |
| Φ45 | 45.5 | 46.7 | 12.25 | 11.75 | 7.25 | 6.75 | 14 | 16.5 | 71.2 |
| Φ48 | 49 | 50.5 | 12.25 | 11.75 | 7.25 | 6.75 | 14 | 16.5 | 75 |
| Φ52 | 53 | 54.5 | 14.25 | 13.75 | 8.25 | 7.75 | 16 | 18.9 | 83 |
| Φ56 | 57 | 58.5 | 14.25 | 13.75 | 8.25 | 7.75 | 16 | 18.9 | 87 |
| Φ60 | 61 | 62.5 | 14.25 | 13.75 | 8.25 | 7.75 | 16 | 18.9 | 91 |
| Φ64 | 65 | 66.5 | 14.25 | 13.75 | 8.25 | 7.75 | 16 | 18.9 | 95 |
| Φ68 | 69 | 70.5 | 14.25 | 13.75 | 8.25 | 7.75 | 16 | 18.9 | 99 |
| Φ72 | 73 | 74.5 | 14.25 | 13.75 | 8.25 | 7.75 | 16 | 18.9 | 103 |
| Φ80 | 81 | 82.5 | 14.25 | 13.75 | 8.25 | 7.75 | 16 | 18.9 | 111 |
| Φ90 | 91 | 92.5 | 14.25 | 13.75 | 8.25 | 7.75 | 16 | 18.9 | 121 |
| Φ100 | 101 | 102.5 | 14.25 | 13.75 | 8.25 | 7.75 | 16 | 18.9 | 131 |