Description and Translation of GB 93 Fasteners
GB 93 fasteners, a key Chinese standard for mechanical components, function as spring washers widely used in machinery, electrical equipment, and industrial assemblies. Their primary role is to provide anti-loosening functionality in threaded connections, maintaining clamping force by utilizing elastic deformation to absorb vibration and prevent nut/bolt loosening under dynamic loads. These washers ensure joint stability in applications subject to cyclic stress, thermal expansion, or mechanical vibration.
In terms of materials, GB 93 fasteners are predominantly manufactured from high-carbon spring steel (e.g., 65Mn and 70# steel conforming to relevant standards), offering excellent elasticity, fatigue resistance, and mechanical strength. This material selection ensures the washers can repeatedly deform and recover while maintaining their anti-loosening performance over extended service life.
Surface treatments include zinc plating with passivation to enhance corrosion resistance, phosphate coating for improved lubrication during assembly, and black oxide coating for increased wear resistance and aesthetic appearance. These treatments effectively extend service life and optimize performance in various operating environments.
Key characteristics of GB 93 fasteners include standardized inner diameters and free heights, dished annular profiles with a single split, and precise dimensional tolerances ensuring proper functioning. Their mechanical attributes feature specified hardness values (typically HRC 42-50), appropriate elastic deformation range, and uniform thickness. Additionally, they exhibit reliable anti-loosening performance and good compatibility with bolts/nuts of corresponding sizes, making them indispensable in mechanical fastening applications requiring vibration resistance.
| Nominal Diameter | 2 | 2.5 | 3 | 4 | 5 | 6 | 8 | 10 | 12 | -14 | ||
| d | min | 2.1 | 2.6 | 3.1 | 4.1 | 5.1 | 6.2 | 8.2 | 10.2 | 12.3 | 14.3 | |
| max | 2.3 | 2.8 | 3.3 | 4.4 | 5.4 | 6.7 | 8.7 | 10.7 | 12.8 | 14.9 | ||
| h | Nominal Size | 0.6 | 0.8 | 1 | 1.2 | 1.6 | 2 | 2.5 | 3 | 3.5 | 4 | |
| min | 0.52 | 0.7 | 0.9 | 1.1 | 1.5 | 1.9 | 2.35 | 2.85 | 3.3 | 3.8 | ||
| max | 0.68 | 0.9 | 1.1 | 1.3 | 1.7 | 2.1 | 2.65 | 3.15 | 3.7 | 4.2 | ||
| n | min | 0.52 | 0.7 | 0.9 | 1.1 | 1.5 | 1.9 | 2.35 | 2.85 | 3.3 | 3.8 | |
| max | 0.68 | 0.9 | 1.1 | 1.3 | 1.7 | 2.1 | 2.65 | 3.15 | 3.7 | 4.2 | ||
| H | min | 1.2 | 1.6 | 2 | 2.4 | 3.2 | 4 | 5 | 6 | 7 | 8 | |
| max | 1.5 | 2.1 | 2.6 | 3 | 4 | 5 | 6.5 | 8 | 9 | 10.5 | ||
| per 1000 units ≈ kg | 0.023 | 0.053 | 0.097 | 0.182 | 0.406 | 0.745 | 1.53 | 2.82 | 4.63 | 6.85 | ||
Description and Translation of GB 93 Fasteners
GB 93 fasteners, a key Chinese standard for mechanical components, function as spring washers widely used in machinery, electrical equipment, and industrial assemblies. Their primary role is to provide anti-loosening functionality in threaded connections, maintaining clamping force by utilizing elastic deformation to absorb vibration and prevent nut/bolt loosening under dynamic loads. These washers ensure joint stability in applications subject to cyclic stress, thermal expansion, or mechanical vibration.
In terms of materials, GB 93 fasteners are predominantly manufactured from high-carbon spring steel (e.g., 65Mn and 70# steel conforming to relevant standards), offering excellent elasticity, fatigue resistance, and mechanical strength. This material selection ensures the washers can repeatedly deform and recover while maintaining their anti-loosening performance over extended service life.
Surface treatments include zinc plating with passivation to enhance corrosion resistance, phosphate coating for improved lubrication during assembly, and black oxide coating for increased wear resistance and aesthetic appearance. These treatments effectively extend service life and optimize performance in various operating environments.
Key characteristics of GB 93 fasteners include standardized inner diameters and free heights, dished annular profiles with a single split, and precise dimensional tolerances ensuring proper functioning. Their mechanical attributes feature specified hardness values (typically HRC 42-50), appropriate elastic deformation range, and uniform thickness. Additionally, they exhibit reliable anti-loosening performance and good compatibility with bolts/nuts of corresponding sizes, making them indispensable in mechanical fastening applications requiring vibration resistance.
| Nominal Diameter | 2 | 2.5 | 3 | 4 | 5 | 6 | 8 | 10 | 12 | -14 | ||
| d | min | 2.1 | 2.6 | 3.1 | 4.1 | 5.1 | 6.2 | 8.2 | 10.2 | 12.3 | 14.3 | |
| max | 2.3 | 2.8 | 3.3 | 4.4 | 5.4 | 6.7 | 8.7 | 10.7 | 12.8 | 14.9 | ||
| h | Nominal Size | 0.6 | 0.8 | 1 | 1.2 | 1.6 | 2 | 2.5 | 3 | 3.5 | 4 | |
| min | 0.52 | 0.7 | 0.9 | 1.1 | 1.5 | 1.9 | 2.35 | 2.85 | 3.3 | 3.8 | ||
| max | 0.68 | 0.9 | 1.1 | 1.3 | 1.7 | 2.1 | 2.65 | 3.15 | 3.7 | 4.2 | ||
| n | min | 0.52 | 0.7 | 0.9 | 1.1 | 1.5 | 1.9 | 2.35 | 2.85 | 3.3 | 3.8 | |
| max | 0.68 | 0.9 | 1.1 | 1.3 | 1.7 | 2.1 | 2.65 | 3.15 | 3.7 | 4.2 | ||
| H | min | 1.2 | 1.6 | 2 | 2.4 | 3.2 | 4 | 5 | 6 | 7 | 8 | |
| max | 1.5 | 2.1 | 2.6 | 3 | 4 | 5 | 6.5 | 8 | 9 | 10.5 | ||
| per 1000 units ≈ kg | 0.023 | 0.053 | 0.097 | 0.182 | 0.406 | 0.745 | 1.53 | 2.82 | 4.63 | 6.85 | ||
