This type of spring washer device is used under the nut to prevent the nut from loosening, Used in heat exchanger, pressure vessel and other high temperature and high pressure sealing parts, it can effectively prevent the loose frame of gasket and the erosion of medium.
| Screw Thread d | Φ2.5 | Φ3 | (Φ3.5) | Φ4 | Φ5 | Φ6 | Φ8 | Φ10 | |||||
| d | max | 2.9 | 3.4 | 3.9 | 4.4 | 5.4 | 6.5 | 8.6 | 10.8 | ||||
| min | 2.6 | 3.1 | 3.6 | 4.1 | 5.1 | 6.1 | 8.2 | 10.2 | |||||
| b | Nominal Size | 1 | 1.3 | 1.3 | 1.5 | 1.8 | 2.5 | 3 | 3.5 | ||||
| max | 1.1 | 1.4 | 1.4 | 1.6 | 1.9 | 2.65 | 3.15 | 3.7 | |||||
| min | 0.9 | 1.2 | 1.2 | 1.4 | 1.7 | 2.35 | 2.85 | 3.3 | |||||
| h | Nominal Size | 0.6 | 0.7 | 0.7 | 0.8 | 1 | 1.2 | 1.6 | 1.8 | ||||
| max | 0.7 | 0.8 | 0.8 | 0.9 | 1.1 | 1.3 | 1.7 | 1.95 | |||||
| min | 0.5 | 0.6 | 0.6 | 0.7 | 0.9 | 1.1 | 1.5 | 1.65 | |||||
| dc | max | 5.2 | 6.3 | 6.8 | 7.7 | 9.4 | 11.9 | 15 | 18.4 | ||||
| H | 0.9 | 1.05 | 1.05 | 1.2 | 1.5 | 1.8 | 2.4 | 2.7 | |||||
| Screw Thread d | Φ12 | (Φ14) | Φ16 | (Φ18) | Φ20 | (Φ22) | Φ24 | Φ27 | |||||
| d | max | 13 | 15 | 17.2 | 19.2 | 21.4 | 23.7 | 25.7 | 28.7 | ||||
| min | 12.2 | 14.2 | 16.2 | 18.2 | 20.2 | 22.5 | 24.5 | 27.5 | |||||
| b | Nominal Size | 4 | 4.5 | 5 | 5.5 | 6 | 6.5 | 7 | 7 | ||||
| max | 4.2 | 4.7 | 5.2 | 5.7 | 6.2 | 6.7 | 7.25 | 7.25 | |||||
| min | 3.8 | 4.3 | 4.8 | 5.3 | 5.8 | 6.3 | 6.75 | 6.75 | |||||
| h | Nominal Size | 2.1 | 2.4 | 2.8 | 3 | 3.2 | 3.5 | 3.8 | 4 | ||||
| max | 2.25 | 2.55 | 3 | 3.2 | 3.4 | 3.7 | 4.05 | 4.25 | |||||
| min | 1.95 | 2.25 | 2.6 | 2.8 | 3 | 3.3 | 3.55 | 3.75 | |||||
| dc | max | 21.6 | 24.6 | 27.8 | 30.6 | 33.8 | 37.1 | 40.2 | 43 | ||||
| H | 3.15 | 3.6 | 4.2 | 4.5 | 4.8 | 5.3 | 5.7 | 6 | |||||