Description and Translation of ISO 4161 Fasteners
ISO 4161 fasteners, an international standard for mechanical components, serve as essential connecting elements widely used in general machinery, automotive assemblies, and industrial equipment. Their primary function is to create reliable detachable joints capable of transmitting static and moderate dynamic loads, ensuring structural stability and operational safety across diverse applications. These fasteners facilitate standardized assembly processes while enabling efficient maintenance and component replacement.
In terms of materials, ISO 4161 fasteners are predominantly manufactured from carbon steel (e.g., property class 8.8 per ISO 898-1) and alloy steel, providing excellent tensile strength and mechanical durability. For corrosion-resistant requirements, stainless steel variants (e.g., A2-70, A4-80 conforming to ISO 3506) are specified to ensure performance in humid or chemically exposed environments.
Surface treatments include zinc plating with passivation for enhanced corrosion protection, phosphate coating to improve lubrication during installation, and electroplated nickel for superior surface finish and wear resistance. These treatments effectively extend service life and optimize compatibility with various operating conditions.
Key characteristics of ISO 4161 fasteners include standardized metric coarse threads, hexagonal head designs with chamfered edges, and precise dimensional tolerances ensuring global interchangeability. Their mechanical attributes feature specified tensile strengths (minimum 800 MPa for class 8.8), appropriate yield ratios, and sufficient ductility. Additionally, they exhibit consistent torque-tension relationships and reliable clamping performance, making them a globally recognized choice for general industrial applications and mechanical engineering.
| Screw Thread d | M5 | M6 | M8 | M10 | M12 | (M14) | M16 | M20 | |
| P | Pitch | 0.8 | 1 | 1.25 | 1.5 | 1.75 | 2 | 2 | 2.5 |
| c | min | 1 | 1.1 | 1.2 | 1.5 | 1.8 | 2.1 | 2.4 | 3 |
| da | max | 5.75 | 6.75 | 8.75 | 10.8 | 13 | 15.1 | 17.3 | 21.6 |
| min | 5 | 6 | 8 | 10 | 12 | 14 | 16 | 20 | |
| dc | max | 11.8 | 14.2 | 17.9 | 21.8 | 26 | 29.9 | 34.5 | 42.8 |
| dw | min | 9.8 | 12.2 | 15.8 | 19.6 | 23.8 | 27.6 | 31.9 | 39.9 |
| e | min | 8.79 | 11.05 | 14.38 | 16.64 | 20.03 | 23.36 | 26.75 | 32.95 |
| m | max | 5 | 6 | 8 | 10 | 12 | 14 | 16 | 20 |
| min | 4.7 | 5.7 | 7.64 | 9.64 | 11.57 | 13.3 | 15.3 | 18.7 | |
| mw | min | 2.5 | 3.1 | 4.6 | 5.6 | 6.8 | 7.7 | 8.9 | 10.7 |
| s | max | 8 | 10 | 13 | 15 | 18 | 21 | 24 | 30 |
| min | 7.78 | 9.78 | 12.73 | 14.73 | 17.73 | 20.67 | 23.67 | 29.16 | |
| r | max | 0.3 | 0.4 | 0.5 | 0.6 | 0.7 | 0.9 | 1 | 1.2 |
Description and Translation of ISO 4161 Fasteners
ISO 4161 fasteners, an international standard for mechanical components, serve as essential connecting elements widely used in general machinery, automotive assemblies, and industrial equipment. Their primary function is to create reliable detachable joints capable of transmitting static and moderate dynamic loads, ensuring structural stability and operational safety across diverse applications. These fasteners facilitate standardized assembly processes while enabling efficient maintenance and component replacement.
In terms of materials, ISO 4161 fasteners are predominantly manufactured from carbon steel (e.g., property class 8.8 per ISO 898-1) and alloy steel, providing excellent tensile strength and mechanical durability. For corrosion-resistant requirements, stainless steel variants (e.g., A2-70, A4-80 conforming to ISO 3506) are specified to ensure performance in humid or chemically exposed environments.
Surface treatments include zinc plating with passivation for enhanced corrosion protection, phosphate coating to improve lubrication during installation, and electroplated nickel for superior surface finish and wear resistance. These treatments effectively extend service life and optimize compatibility with various operating conditions.
Key characteristics of ISO 4161 fasteners include standardized metric coarse threads, hexagonal head designs with chamfered edges, and precise dimensional tolerances ensuring global interchangeability. Their mechanical attributes feature specified tensile strengths (minimum 800 MPa for class 8.8), appropriate yield ratios, and sufficient ductility. Additionally, they exhibit consistent torque-tension relationships and reliable clamping performance, making them a globally recognized choice for general industrial applications and mechanical engineering.
| Screw Thread d | M5 | M6 | M8 | M10 | M12 | (M14) | M16 | M20 | |
| P | Pitch | 0.8 | 1 | 1.25 | 1.5 | 1.75 | 2 | 2 | 2.5 |
| c | min | 1 | 1.1 | 1.2 | 1.5 | 1.8 | 2.1 | 2.4 | 3 |
| da | max | 5.75 | 6.75 | 8.75 | 10.8 | 13 | 15.1 | 17.3 | 21.6 |
| min | 5 | 6 | 8 | 10 | 12 | 14 | 16 | 20 | |
| dc | max | 11.8 | 14.2 | 17.9 | 21.8 | 26 | 29.9 | 34.5 | 42.8 |
| dw | min | 9.8 | 12.2 | 15.8 | 19.6 | 23.8 | 27.6 | 31.9 | 39.9 |
| e | min | 8.79 | 11.05 | 14.38 | 16.64 | 20.03 | 23.36 | 26.75 | 32.95 |
| m | max | 5 | 6 | 8 | 10 | 12 | 14 | 16 | 20 |
| min | 4.7 | 5.7 | 7.64 | 9.64 | 11.57 | 13.3 | 15.3 | 18.7 | |
| mw | min | 2.5 | 3.1 | 4.6 | 5.6 | 6.8 | 7.7 | 8.9 | 10.7 |
| s | max | 8 | 10 | 13 | 15 | 18 | 21 | 24 | 30 |
| min | 7.78 | 9.78 | 12.73 | 14.73 | 17.73 | 20.67 | 23.67 | 29.16 | |
| r | max | 0.3 | 0.4 | 0.5 | 0.6 | 0.7 | 0.9 | 1 | 1.2 |
